Washington Post: Their editorial page has a broader spectrum of viewpoints than the New York Times, and they still carry Ted Rall and Boondocks!
New York Times: Usually spouts the party line, but it's helpful to know what the party line is.
CNN: Mostly useful for breaking events; they pretty much follow the party line once it's established.
Detroit Free Press
Ann Arbor MLive
MLive News Flash
World Socialist Web Site: In depth analysis.
Common Dreams: Selection of alternative viewpoints from around the world.
FAIR's List of Online News Sources. FAIR is Fairness & Accuracy in Reporting
Tom Tomorrow's Links Page: Lots of other online news sources, plus some really crazy comics (especially Red Meat, which isn't political, but totally cracks me up!).
Sydney Morning Herald (Australia)
The Guardian (UK)