Most Heinlein. You have to rember these were written in the cold war time so theres always a USA Vs USSR type of hero/ villan (and the ocassional oedipus issues) but the beauty of Heinlein to me if the fact the characters and inventions appear in cameos' in other books, and that gives it a more believeable universe feel to me.
Colossus by Feltham Jones (According to Wikipedia) Interesting twist to the idea of a master computer to help man then taking over the world.
Charles Stross - read The Atrocity Archives recently and liked it, probably as its scifi in the present time, am looking for more of his at the moment.
Lincon Child's Utopia, theme park gone mad.
I'm guessing you detect a trend in my reading, although I liked Michael Crighton but of late I can take or leave it, Andromedra strain was excelent.