Check out DZone.com
It's like digg, but for developers!
I got a chance to meet the guys behind dzone.com at the AJAX Experience conference last week. It's a community driven site where the users control which content makes it popular on the front page. The items that make it on the dzone.com front page are focused on developer related topics.
I added it to my favorites last week and have been making it a daily reading site since then. So far, so good. I'm keeping it on my home tabs in IE7! Check it out. And don't be shy to post about any .NET development related topics up there!