Slashdot - News for Nerds. Stuff that matters. I've been frequenting this site for years. It has its ups and downs, but I still visit regularly.

EN World - A great site for information about role playing games. The site leans heavily leans toward Dungeons & Dragons, especially the most recent editions.

Electonic Frontier Foundation (EFF) - True defenders of freedom. These guys are watchdogs against corruption. Take a good look to see what they stand for and help them out if you can.