Xbox Live Running Out Of GamerTags?

A blurb over at Boomtown seems to hint that Xbox Live is running into problems with similar GamerTags, and even going to the point of asking gamers to change them.

“As a loyal Xbox Live subscriber since the open public beta I thought my GamerTag was pretty safe. I was surprised, then, to receive an e-mail from Microsoft this morning telling me that my GamerTag was very similar to someone else’s and would I mind changing it. Apparently I have ten days to change it and I can claim a free copy of Project Gotham Racing 2 for doing so. It seems that this e-mail has gone out to any subscribers with similar GamerTags to other subscribers.”
-Jonathan Lane (LordDestroyer)