I've finally started working on a small project, namely, a bibliography on skepticism. So far, I have just made a long list of works which is up-to-date but still very incomplete. Also, my idea is to divide it into at least four sections: ancient skepticism, medieval skepticism, modern skepticism, and contemporary skepticism. This provisional bibliography can be found here.
Update 02/01/2010: the bibliography is now divided into four parts, and I've added a few more books and papers. It will take me a while to make it relatively complete.