Oh, good! Another fun place to find toys to play with!
25 Useful Social Networking Tools for Librarians
"From academic libraries like that at MIT or renowned research centers like the Library of Congress, the following beta research tools feature innovative tricks to connect you with the most relevant, valid results - including books (real and digital), articles, documents, web sites, and more."
I attended a workshop on Zotero (#15) last week and plan to use it as I began working on my thesis.