The Guardian has a section on TwiTrips - people micro-blogging on Twitter while traveling and taking suggestions from other Twitter users along the way:
Introducing: Twitter trips:
So we're going run an experiment. At some point over the next few weeks, I'm going to Paris. I'm not going to plan much. Rather, I'm going to leave it to the tweetosphere. When we run the Twitrip, we'll let you know ... and then we'll live blog it as we go, with all your tweeted tips and suggestions live and welcome. It may well start with "Right, I'm at the Gare du Nord ... where should I go?" And after we've road-tested the system, we're hoping to open it up to guest Twitrippers. Stay tuned.