The only reason why I suggested a contest is not so much because of the hard cash (it may not even need to be a reward), but things like @RealFaction's Art-Inspired Music contest that happens each year can be a strong motivating factor if they gain support from the upper echelons of the site.
Alternatively, we can all band together, X number of us, barge into the Animation Forum and offer them a collab playlist or festival-type thing i.e. Music-Based Animation?
Troisnyx
I agree. Hardly anyone does this...
What if we made it a contest?
ForgottenDawn
Maybe not necessarily a contest, even though I realize hard cash and being competitive could be a motivating factor for some, but I honestly believe in collabs more just for the sake of creating and stimulating the process. I mean, I think Newgrounds is a great place for collaborating between various folks from all kinds of backgrounds, cultural and artistic, and it's so easy to get in touch, too. So, in the end all I'm saying is... why not? Why doesn't this happen more often?