I’ve been writing a lot lately about the birthers —the people who contend that Barack Obama cannot be President because he was not born in the United States or, even if he was, because he cannot meet the definition of a “natural born citizen” — lately, but there are many other sites out there that have gathered the information that I’ve referred to when debunking one argument or another.
First up, there’s the excellent site Obama Conspiracy Theories. This site is run by a guy calling himself Dr. Conspiracy, who’s done an excellent job of examining, in detail pretty much every argument the birthers make. He’s also got an up-to-date docket of all the pending birther lawsuits (there aren’t many of those left, by the way).
Next, as a one stop resource there’s this post at Daily Kos which links to source material to debunk all of the birther’s major arguments.
Other blogs have also devoted themselves to debunking the birthers including Native And Natural Born Citizenship Explored, Oh For Goodness Sake, and Yes To Democracy. And, if you’re really into bashing birthers, you can join the Politijab forums.

Why is supplying exact address of birthplace a problem?
President / exact address of birthplace
Barack Obama ______________________________
George W Bush Yale New Haven Hospital New Haven,CT
Bill Clinton Julia Chester Hospital, Hope AK
Bush Sr. 173 Adams St Milton MA
Ronald Reagan 111 S. Main St., Tampico, IL