Sources

I did a quick little experiment using the Truth Laid Bear's Ecosystem to calculate citations and links to mainstream new sources. The results:

Washington Post - 2216

New York Times - 2174

Yahoo! News - 1305

CNN - 1146

BBC News - 844

Guardian - 668

Salon - 447 (blogs.salon.com excluded)

Fox News - 340

Reuters - 317

The New Republic - 287 (& included)

UPI - 244

Washington Times - 214

The Nation - 211

Christan Science Monitor - 172

Not calculated:

MSNBC (and Slate) - disabled by ecosystem; likely to avoid attempts to add Alterman's blog for technical reasons

National Review - couldn't exclude The Corner