Aid Workers Network

Aid Workers Network is a portal through which one can communicate with aid workers in a variety of ways.  There's an active forum and blog index--both allow the international aid community to exchange ideas, information, even job openings.  The site also features an extensive library of articles dubbed "Advice Pages" that include user-generated tips on topics including the distribution standards of non-food items during crisis and international telecommunications.  The site is run by a non-profit of the same name that's based in the United Kingdom.

Arts & Letters Daily

Arts & Letters Daily is a news and commentary aggregator owned by The Chronicle of Higher Education.  ALD's editors trawl the Internet for links related to the ALD theme, which is pretty broad.  The masthead describes the site's breadth: "philosophy, aesthetics, literature, language, ideas, criticism, culture, history, music, art, trends, breakthroughs, disputes, gossip."  It's pretty wide, and it's right up my alley (and very similar that of 3QuarksDaily).  I love this stuff, and I spend an inappropriate amount of time reading a lot of it. 

Which is why I'm up this late cramming out Assemblage posts.

Lightstalkers

Lightstalkers is an online community for photojournalists around the world.  The main section of the site is the discussion board, on which registered photogs discuss seemingly any PJ-related topic under the sun.  The board is a clearinghouse for job opportunities, gear talk, industry news, new photography, and much more (I remember some older posts: a freelance photog inquiring about the best place to purchase body armor in Baghdad, another freelancer asking how to get tens of thousands of dollars worth of equipment through airport security, and an art show organizer advertising a call for work).  The site also features a prominent alert system (for breaking news and opportunities), a twitter-esque photographer-tracker called On the Move (for which all users can broadcast their current location), and an upcoming events board.  The greatest asset of the site, though, is the users.  They are energetic, knowledgeable, and--even in the ultra-competitive world of photojournalism--more than happy to help.