I don't really think of any of the new girls as "porn stars" They just aren't "known" in the mainstream.
For me it would be the old school bitches. Seka would be my number one. Other ones that I considered to be "stars" were Marilyn Chambers, Ginger Lynn, Christy Canyon, Minka, and Kayla Kleevage. Matter of fact Kayla had a part in the Farell Brothers movie "The Heartbreak Kid" with Ben Stiller in 2007. She played a giant fake tit whore who is naked in the hot tub with Jerry Stiller in Vegas.
Those are the stars who have name value in the general public to me. Not sure many media outlets or average joes on the street might know who in the heck any of our fave girls online are at all.