I believe in twitter, and I believe in Social Media in general as a marketing, and fan base empowerment tool. If done properly.
Joe is an iphone user, there is a twitter app he can get for free, and then he can tweet all day long for free on his cellphone that is in his pocket.
How interesting would it be to hear the occasional update from recording...for example...
"Just laid down a track for a new song, not sure it fits the new record, but man the fuzz sound I got scared even me."
So now you are thinking about a song Joe is working on, the tone of the song, the new stuff.
Or how about this...
"While Europe is awesome, the bass player just fell out of his bunk for the third time, cannot tell if it is the windy roads, or if the bass player has vertigo"
Now that is fun, light hearted, it keeps you buying into the journey.
or this...
"I know that the after show meet and greet thing is a tradition, and I love it, but I am just part of a band, and they deserve more love."
Shows Joe to be noble.
Or...
"Tonight after the show stopped and talked to CathyS, and Tanya, I love coming to this town. They are some of my favorite peope."
How cool would you feel if you were Cathy S or Tanya?
It allows Joe to embrace a new tool, that 15 million are using. Obama used it, and it swung votes. His narrative would be followed by the fans, who would have their own followers on twitter, and thusly the word would spread about Joe.
The danger is, using twitter improperly. Using it as something sort of corporate, and purely for marketing, is a mistake, and will lead to a backlash.
Twitter is relationship based, relationship based marketing.
I hope he does it.