Other sites, but not much luck
It's surprising to find so little of Einstein's work online in English. There are a few sites which offer links to digitized images of his original work (mostly in German). See the Wikipedia entry for Einstein (http://en.wikipedia.org/wiki/Albert_Einstein) for a short bio and bibliography. Even this site at Cal-Tech (http://www.einstein.caltech.edu/) does not publish online the English version, though you can order both the original and the translated versions from them. One final link is to a couple of Einstein's papers over at Project Gutenburg (http://www.gutenberg.org/browse/authors/e#a1630).