In no particular order...

Purgatori
Company: Chaos! Comics
Currently: Limited series
Why She Heats You Up: Blood-sucking vampire goddess who used to be a mortal Egyptian slave by the name Sakarra. Known for bringing mass amounts of evil to all around her and even creating her own vampire city, what's not to love?
Why She Leaves You Cold: You don¹t have to worry about not calling her the morning after, because you most likely won't be alive the morning after.

Vampirella
Company: Harris Comics
Currently: In ongoing series.
Why She Heats You Up: She's a killer with a conscience. One of the sexiest vampires to run against Stoker's classic, she still craves blood but only kills the baddies, plus she wears that really skimpy outfit. Impervious to cold, sharp wit and a bad ass attitude make her highly desirable. Plus, her current series is one of the best-written ones to date, thanks to Millar.
Why She Leaves You Cold: She's a bit flighty, taking off whenever the urge hits her without actually giving you all the details, mostly so you'll be safe. Has a bad habit of taking on entire legions of bad guys just to prove a point.

Catwoman
Company: DC Comics
Currently: Ongoing series
Why She Heats You Up: She runs around in a skintight outfit, kicks ass and steals jewels and other valuables, where's the problem? Selina Kyle has delighted us in all her incredible forms: from Kitt's TV portrayal to the deadly, dangerous, drop-dead gorgeous movie version played by Michelle Pfieffer to her many comic forms, ranging from the classic purple-and-green skirt and kitty mask to the current run that sports an even sleeker remake of Selina, with short-cropped hair and the same tough gal attitude that turns the baddest bullies into purring kitties. Why She Leaves You Cold: Your chances of action will be cut into by crime sprees, saving cats and dealing with Batman, who has a really bad habit of popping up unannounced. Selina will always have a soft spot for the bat and that means all the action you'll see is her feeding her pussies.

Licorice Dust and Boo Kitty
Company: BroadSword Comics
Currently: Appearances in Tarot: Witch of the Black Rose ongoing series.
Why They Heat You Up: The vampire vixen and her feline lover make up this devious duo. Their appearances in Tarot have garnered a lot of attention, so much so that issue #12 will be all about their origins. Boo Cat and Licky D are most at home in the graveyards enjoying each other. Most don't turn away from a sexy duo like that! This isn't Batman and Robin! Seductive drawings by Jim Balent, with the occasional penciled rendering by Holly GoLightly, make many swoon over this deadly pair. But underneath their evil charms lie hearts of gold, at least for each other!
Why They Leave You Cold: Well, in case you haven't noticed, Boo and Licky D are all about each other. The only other sparkle you'll find in Boo Kitty's eye is for Tarot, the strong-willed, redheaded witch in the series of the same name. You may be lucky if you get a snapshot of the two, but don't count on any menage a trois!

Dawn
Company: Linsner.com Comics, soon to be Image Comics this March. Currently: Limited series
Why She Heats You Up: Do you really want to argue with a goddess? Dawn is the goddess of birth and rebirth. She's charmed both Heaven and Hell and neither is really sure what to do with her. Her fire tresses, tear-stained eye and hourglass body have destroyed mortals and gods alike. Why She Leaves You Cold: She doesn't come out nearly often enough and her lover is Death. Do you really want to arm wrestle with Death? Granted, you can take him out for a few beers and have a go at it, but do you want to deal with his hangover the next morning or his wrath all for one night with the goddess?

Aprodite IX
Company: Top Cow/Image Comics
Currently: Ongoing series
Why She Heats You Up: She's a deadly assassin who forgets everything almost seconds after it's done. Her amnesia is a convenient excuse when you want to high tail it out the next morning without any mushy stuff. Designed for ultimate carnage, she was also created with a perfect body, which makes it easy to charm her targets out of comfortable surroundings and away from bodyguards.
Why She Leaves You Cold: The first issue of Aprodite IX sold amazing numbers; retailers were reordering like mad to keep up with the demand. With Finch's art and script, it was an actual story with looks and bite. But you had to wait almost a year for the next freaking issue to come out. Aprodite may be a green-haired goddess, but it turns out she's a big tease with a big gun and she knows how to use both. Plus, Finch is leaving the book and although the new artist is good, this android assassin isn¹t going to be the same.

Wonder Woman
Company: DC Comics
Currently: Ongoing series
Why She Heats You Up: The raven-tressed Amazon doesn't really need to charm anyone. If she wanted a date, she could strong-arm anyone she chose. Super hero strength, the ability to fly, hails from an island of women, and has a nifty golden lasso that could come in handy in the bedroom. Diana Prince is a classic Greek beauty, the kind that would have beat Donna of Troy, except Diana is probably a bit too nice to get into a beauty contest. But she's no pushover, and easily stands up to any challenge ... and usually wins.
Why She Leaves You Cold: The aforementioned golden lasso is a nice little bondage tool, but it also happens to be the lasso of truth. You could spend your nights tied up confessing all your deep hidden secrets, and that's enough to scare off any one.

Natalia Kassle
Company: DC Comics
Currently: Limited Series
Why She Heats You Up: A deadly undercover spy with a penchant for sharp things, you better like her or you could wind up with your throat sliced.
Why She Leaves You Cold: Turns out this hot blonde with the icy stare and no-nonsense attitude is not only a damn good spy, she's a double agent who double crosses her friends, landing them in serious peril. If that's what she does to her friends, imagine what she does to her dates.

Roxy Spaulding
(a.k.a. FreeFall)
Company: DC/WildStorm Comics
Currently: Ongoing Series
Why She Heats You Up: She's sarcastic, smokes (at least in the early incarnations of the book), has anti-gravitational powers, and fancies combat boots and purple and/or pink-streaked hair. Always portrayed as the awkward teenager without the looks amidst the knockout forms of her teammates, Fairchild & Rainmaker. But it's her shyness and playfulness that makes her so attractive.
Why She Leaves You Cold: Unfortunately for her and all interested in her, FreeFall is totally wrapped up in another teammate, Grunge, who stupidly ignores all her sincere advances. Instead, he fumbles for excuses to gawk at Fairchild, Rainmaker and any other woman that appears to have a body built by Bally's. Although all around her can see FreeFall continually setting herself up for heartbreak, she steadfastly refuses to see the obvious and follows Grunge, hopelessly in love.