Check out developerFusion. The site "aims to bring together developers all over the globe, whilst delivering top-notch technical know-how."
It is a great place to check out the latest news and events. You can even register your user group, as we have done with the Silverlight User Group.
So if you are looking for a central place to keep up to date with events within the developer community then this could be a good site for you to keep an eye on.