Note: This question and answer is a full copy from Kelly Brownsbergers Blog. I do post it as a convenience to others.
From time to time, my status bar disappears. I used to believe this was due to a botched install or add-in. I recently upgraded to Team System Test Edition, and my status bar again disappeared. For the last few weeks I’ve been trying to figure out a time to do a full reinstall.
To not take rep for this, I have marked it communitiy wiki.