Online Library Communities

I’ve been wondering, what kind of cross-pollination is going on in the library world?

Specifically, in addition to the one you are reading this post on, what listserves, journalsites, or bloglists are people a part of, or a regular contributor to?

Myself I take part in LISNews, Next Gen Librarians, Chatty Librarians, Library Underground, and Publib (although I don’t read Publib that much).