Stack Overflow is a great new programmer Q & A site from Jeff Atwood and Joel Spolsky.  I (and about 500 other developers) got a 5-week headstart on using it as part of the private beta test.  As good as googling for answers to development problems has been, Stack Overflow is a big improvement.  I’ve already gotten answers to questions that I was able to use in my own work.

If you write code for a living, I strongly encourage you to check out the site.  They support OpenID, so you can use your existing Yahoo! or Blogger (other other OpenID-compliant) identity to register with the site.  You can use it anonymously as well.