If you just can’t get enough of pictures of mathematicians, head over to the Oberwolfach Photo Collection. This is a huge collection, which I recently ran across when trying to locate something by Graeme Segal. It also includes a photo of a frequent contributor here.
The AMS has put quite a few whole books on-line. Recently they added the three-volume set A Century of Mathematics in America here, here, and here. Another interesting volume is Mathematics into the Twenty-First Century, which includes some wonderful survey articles, including a very long series on Lie theory by Roger Howe, and one on Geometry and Quantum Field Theory by Witten.
Terrance Tao has a sort of research blog.
In the category of interesting-looking work that I haven’t yet had time to read carefully and think about, here are two papers on an approach to studying pure Yang-Mills theory, by Freidel and Freidel and collaborators.
Update: A correspondent suggests I mention another famous mathematician whose photo is on the Oberwolfach site.