There is already an extremely active contest group like this. We do monthly contests and everyone gets to vote for the winner.
If we combine these two groups, the contests would have a lot more entries :D
The most entries we've had in one contest is 9
Check it out here ---> http://musescore.com/groups/contests
P.S. let me know if you want me to delete this discussion dadedan :)
I will actually give the theme/song early the month before, so you have time to make a song, you can start entering your scores the first day of the month, and on the first day of the month I will give a due date. These compositions/Arrangements can be any assorting of instruments, whether it's solo, ensemble, orchestral (String or full), jazz band, wind ensemble, marching band, choral, doesn't matter. I will give the theme and song for February later today. :) see ya later