TripIt, the service that creates master travel itineraries out of your confirmation emails, has become even more traveler-friendly with a new mobile site.

Users can access the site at m.tripit.com with their handheld devices. We’ve been told it works best with Blackberrys, iPhones, and Treos (the shot on the right is obviously how it looks on an iPhone).

The new site will support TripIt’s Closeness Matches, a feature that informs travelers when they’ll be in the same areas as their friends. It’s a feature that may very well have been inspired by Dopplr, another hot startup in the travel space.

Michael recently named TripIt as one of the Web 2.0 companies he couldn’t live without.