The Nobel prize site has a nice biography of Einstein as well as links to his acceptance speech (in German) and one of Einstein's papers on relativity.

This is an excellent collection of resources on Einstein and his theories from PBS's Nova series.

Check out the Einstein Archives Online for the primary sources of Einstein's manuscripts and other archival resources.

A website that shows you a little of Einstein's biography and a lot about his theories. The most popular would be the theory of relativity. This site also shows you other famous scientists.

This is the official website of the genius Albert Einstein archives. This includes the world-famous scientist's personal papers and etc.