Antony Flew apparently died on April 8 at age 87. The Internet Infidels have a good selection of some of Flew's atheistic work online. Flew's most famous work is probably his argument that reasonable presumption favors atheism.
Other notable things by Flew that are available online:
Interview with Gary Habermas discussing how he came to give up his atheism
Flew's brief (and a little bit angry) review of Dawkins's The God Delusion.
