Share a Private Tour Guide - Rome - Week of 2/15/10

I am looking for others interested in sharing a private tour guide during the week of 2/15/10. We intend to hire one of the "Rick Steve's-recommended" guides for Rome for a few 1/2 day tours and are flexible on dates (Wed-Fri would work best for us). As it will be my wife's first trip to Rome, we intend to focus on the "touristy" spots.