In the episode, “The Cryogenic Woman” in which Fry ex-girlfriend is cryogenically thawed in the year 3000, who plays his ex-girlfriend? Vocally, I mean. I recognize the voice. I think it might be Mila Kunis of “That 70’s show” fame, but I can’t find a credit listing anywhere.
flupurama
I put “futurama voice michelle” in Google and it spit out a bunch of links pointing to Kath Soucie.
Looks like a veteran voice actor. Check out her IMDB page here:
http://us.imdb.com/Name?Soucie,+Kath
The Futurama credit is on down toward the bottom. Enjoy! 
Kath Soucie, according to this site:
http://www.tvtome.com/Futurama/guide.html
Just so you’ll know, you can also get to this info the other way. Go to the Futurama page at IMDb, click on “guest appearances” under “Overview,” and find the episode you’re looking for.
You must be a level 15 bureaucrat!
I was torn between two replies to this.
or