Not directly programming, but related:
I'm using team explorer 2010 to connect to a 2010 TFS server (On a 2008R2 box), however when I try and connect, I get a red X on the project node and cannot expand it. There are not error messages or anything. Here is an image of what I am getting 
. I have the same exact setup on another system (except Windows 7), using the same credentials and it works fine. Anyone ever run into this before?