Maybe posted before but... i like to see instruments in Glitch. Violins, guitars, triangles, whatever. And the "recipes" for the instruments would be songs to learn.
Then if two or more users come together and both/all learned to play the same song then it would be like following someone in Glitch so that you could join in and play together. Would be fun to have a christmas-song with triangle and e-guitar or stuff like. Perhaps the instruments could be tinkered-engineered somehow too?
So that was my ideea. if anyone posted this before, sorry i was not able to find it but strongly support! ^^