Jeff Atwood and Joel Spolsky got together a little over a year ago to create I think the best online tech communities around. Somehow they where able pull it off which I commend them on their great feat, getting developers to work together!…if you have never heard of these sites, I highly urge you to go and start using these sites!
Online development communities:
My accounts on these sites:
Joel and Jeff have a great podcast as well that I am an avid listener too.
As well the Stack Overflow iPhone app is here!