There's Don Preston, Bunk Gardner and Ed Mann touring Europe as The GrandMothers Of Invention;
and there's Mike Keneally and Joe Travers touring Europe with Joe Satriani as part of his G3 tour.
Terry Bozzio also has dates scheduled in Europe. Solo drum music.
Don't forget Dweezil Zappa who's doing a world tour (and is currently playing in the U.S.),
and there's Napoleon Murphy Brock and Denny Walley who are touring the U.S. with Project/Object right now.
Here's a recording of Project/Object's April 24 concert at 'Toad's Place' in New Haven, CT.