Polling 101
From the Roper Center this is an excellent introduction to polling. What it is, how it is conducted, how to understand sampling and error etc.
Electoral-Vote
A very popular site with an enormous amount of information. Started in 2004 to track state by state polling for the Presidential Election the site continued in 2006 tracking polling for House & Senate races. Electoral-Vote.com also provides daily news briefings on the site and via RSS and a wealth of links and thorough descriptions of its methodology.
Pollster.com
Run by veteran pollster Mark Blumenthal the site has been operational since 2004. It provides a wealth of data, a blog and plenty of information that will be valuable in future elections.
The Cook Political Report
Run by Charles E. Cook JR. the site offers thorough analysis, predictions, the study of trends and statistics and is touted as being widely read by policy makers, trade associations, lobbyists and the like. For the full benefits of the site you must subscribe for a good price but the free version offers a wealth of information and analysis.
