Matrix trilogy can be classed as Cyberpunk. Definitely William Gibson; he is the master. Neal Stephenson, Michael Marshall Smith (Spares, Only Forward, One of Us), Bruce Sterling, Pat Cadigan, the film Hackers (less tangible), Rudy Rucker, Greg Bear, Lewis Shiner, Bladerunner. Films like Minority Report, AI, et al could edge in there too - depends how pure you define Cyberpunk.
Non Fiction -
Armitt 'Where no man has gone before'
Bukatman 'Terminal Identity'
Edward 'Science Fiction in the Twentieth Century'
McCaffery 'Storming the reality studio'
Featherstone 'cyberspace, cyberbodies, cyberpunk'
Stuff by Donna Haraway
Scholes and Rabkin 'Science fiction'
Slusser and Shippey 'Fiction 2000'
Kevin Kelley 'Out of control' (have i remembered that correctly - the one about robotics and stuff)
I think that's all I can remember!