Also, some of Einstein's papers can be found in Hawking's "On the Shoulders of Giants" book.
Andrew James Bruce, Other, Grad Student UK
In May 2003, an archival database went on-line giving free access to Einstein's scientific and non-scientific documents, correspondences, etc. thanks to the Jewish National & University Library, the Hebrew University of Jerusalem and Cal Tech. This great resource can be found at http://www.alberteinstein.info/.
Joseph Kozminski, M.S., Physics Grad Student, MSU, East Lansing, MI