My list varies depending on the time of day, and which computer I'm using, but it's generally a fairly small corner of the news universe...
Most sites I only skim, and some I don't look at for days on end.
Here
NY Times
Krugman's blog
Balloon-Juice
AngryBlackLady
Google News
Brad DeLong's blog
Daily Kos
TBogg
DangerRoom at Wired
Pharyngula
BBC News
MacRumors
Booman Tribune
Pandagon
BlueVirginia.US
Others I frequent, usually daily, include:
WashingtonMonthly
Google Finance
James Fallows and TNC's blogs at The Atlantic
Kevin Drum's blog at MotherJones
CalculatedRisk
I used to keep a tab for Memeorandum, but it got to be too annoying.
HTH a little.
Cheers,
Scott.