I'm in the same situation as the OP. I'm not currently commuting but I plan to start shortly. I don't think my TCR would be a good commuter bike so I'm currently watching craigslist for a good deal and looking in shops. As an FYI REI tends to have neat commuter-type bikes and they're generally well priced. Mega bonus is if you order from their site and the bike doesn't fit you can return it at their stores

Cheers

Rob