Yeah, the loss of Grooveshark was a blow! That, by the way, was why my phone got throttled twice in the last two months--with Grooveshark gone I started making Youtube playlists instead, not really understanding the MASSIVE amounts of bandwidth Youtube gobbles up...

So far I love iMusic, I confess, though I can't compare it to anything other than "no streaming music at all," so my standards are pretty low. Just the ability to make playlists alone has made me so very happy, and their curated lists are really nice!

Fingers crossed for inspiration for you!