Sounds good - we are in Rome from 19th to 22nd. I already booked a night tour at the vatican museum (inc. the sistine chapel) on 20th and the catacombes tour on 21tst 2:30 pm. If you like to join us later that would be great (the tour we book is in German I think).
If you are in Rome for the first time it'll be worth to have a look at this site: http://www.ticketsrome.com/en
We are arriving on the 19th and are looking to experience Rome, tours etc. If anyone would like to do a tour together, we are at the Michaelangelo; please email me at jhejza@aol.com