Here are some places on the web I go to often:
Common Dreams: good daily collection of news stories for the progressive community.
Immanuel Wallerstein writes
commentaries on contemporary events from a long term perspective. He is possibly the most important intellectual in the US regularly commenting on the contemporary world.
Counterpunch is Alexander Cockburn's newsletter--lots of good articles.
Robert Christgau is the dean of US rock critics. His
homepage includes his consumer guide in easy search format.
Narco News has useful information about Colombia and other sites of the US 'war on drugs'.
Naomi Klein's
No Logo website has lots of informative stuff, although its not the prettiest site you'll ever see.
Snopes is an excellent place to determine the veracity of rumours, internet petitions, etc.
I'm not a totally serious, 100% anti-corporate person. Some other sites I visit frequently include
Bluefly (amazing prices on great clothes),
Nerve (the coolest personals--look up Magneticfields :))
E!online (excellent gossip columns).