You can get a free Prolog-like interpreter here. This is the prolog used in the class on the UNIX system. Common Lisp Repository at Carnegie Mellon. This is a local copy. Resource describing faculty and ongoing research at Homewood.
More groups exist for specialized topics such as comp.ai.neural-nets.
Local AI seminar series given by the Navy Center for Applied Research in AI which are open to the public. The Johns Hopkins University's Computer Science Department. The Whiting school's part-time program in Computer Science home page . A CGI interface to the UNIX man pages is on-line.