Seems to me that a #hashtag like #MeanwhileOnTwitter should be floating around so folks who still have a foot on #Twitter can give us a sense of what's going on #OnTwitter.

I have half a dozen or ten people I adore #OnTwitter, Purely Online Friends (or should that be a tag? #PurelyOnlineFriends?), and I'm hoping that in the fullness of time they join the #TwitterMigration and get a pied-à-terre #OnHere (or #OverHere?).