Pros

Twitter does allow you to indulge in a bit of controlled market support (Chanello's, Roma Ristorante) with the luxury of MINIMALISM in messaging.  I do *not* intend to focus on shilling, but this actually isn't a bad little way to keep up with local businesses I like to see thriving.  (Hey, Mediterranean Bakery and Arianna's - your turn!)

Also I've found several wonderful old friends I do not get to see, and can reach out to them without all the security risks of FaceBook.  So that's good.