There is a large game development community over at
GameDev.net - all your game development needs. It's a great site for when you are just starting out...
Other useful websites:
Gamasutra - The Art & Business of Making Games DevMaster.net - Your source for game development
Microsoft hosts a mailinglist dedicated to DirectX programming (DirectXDev); I'm sure they have something similar for XNA.
Another great list to be on is
GD Algorithms. The topics discussed on this list are pretty advanced, but that just means there is lots to be learned!
I have a longer list of resources, but those are pretty much all advanced computer graphics topics (which is my area of expertise). You can PM me if you are ready for those
You might also want to check out
Control, which is a magazine dedicated to Dutch and Belgian game development. It will not help you with your programming, but it makes for a good read on your toilet breaks...
Good luck! Have fun!