Looks like my initial reaction to Twitter of ‘huh? Why is that a good thing?’ might have had some merit to it after all, and not been as sadly behind-the-times as I’d modestly assumed.
Come to think of it, though, I avoided it because the first three times I came across it, I thought it worked primarily through SMS. And my UK mobile is mostly roaming in Ireland right now, so receiving texts costs me. Blech. Also because I currently have 5000+ unread posts in NetNewsWire: how am I supposed to cope with more missives from people I barely know? Huh? Huh? Stop the madness!