I don't know what I've done, but on my TFS source control explorer I have "No commands available" on the context menu! (Panic is setting in)
From the Team Explorer I can see that am a member of Team Foundation Administrators, and I'm a member of the team project administrators as well.
What would be causing TFS to give "no commands available" on the pop-up context menu?
Additional info: I can get to the source control explorer and with additional commands from another machine, so perhaps it's something pooched on my setup (although it was working an hour ago!)