Fat chance. It launches as "an invite-only beta", so I wouldn't get my hopes up.
"It's Wave for bands! It's invite only, so first all the bass players will get their parts up for download. They'll be able to invite 5 other bass players or drummers each. We'll add guitars, keys, and vocals once we've gained traction as the worlds best bass line download site! If we don't get enough users downloading bass lines, we'll close the project down and have the engineers behind it defect to Facebook..."
I could not agree more. That's one thing that I absolutely cannot stand. I understand the need/desire to get to the market first, but an unfinished product is never a good thing.