TFP (no brainer, right?)
<a href="http://www.slashdot.org">Slashdot</a>
<a href="http://www.metafilter.com">MetaFilter</a>, though it appears to have been down the last couple days.
<a href="http://www.boingboing.net">BoingBoing</a>
<a href="http://www.fleshbot.com">Fleshbot</a> (*thanks redlemon!)
Several other blogs that I RSS--Lessig, Futurismic, Gizmodo, Lockergnome, etc.