I just read that the band A Fine Frenzy has been using Twitter to post updates while they're on the road.
I think this is a great idea. It's interesting enough content for fans and it's a really low maintenance way for artists to keep in touch. It's often difficult for an artist to find a regular and reliable internet connection while they're on the road, but everyone's got a cell phone or mobile device handy.
I checked out A Fine Frenzy this morning and, while she's really pretty, I found the music a bit underwhelming. Plus, the chorus to this song reminds me too much of James Blunt's "Goodbye My Lover", and I really resent anyone or anything that makes me think of James Blunt.