A new Daily Kos/Research 2000 poll looked at who watched the three big cable news networks (Fox News, CNN, and MSNBC), and whether they thought them reliable sources of news.
Key findings:
Conservatives (and the South) watch Fox News and little else.
Independents watch little at all
Democrats split their dial between CNN and MSNBC
18-29 year olds don't watch much cable news, but they particularly shun Fox.