the main feature of osc ( to me ) is it's message depth and target naming flexibility. OSC supports 32 bit ints, 32 bit floats, strings, arbitrary target names, etc. so, you could get some benefit out of osc and drum triggering by having drum names instead of number, and more depth on parameters like velocity, but that's prolly about it. the main issue w/ using osc is that i don't know of any sequencers that support it. then again, that's where tools like max/msp come in, i guess :)

here's a good place to start for other ideas on how you might use it:

cnmat.berkeley.edu/OpenSoun...reas.html

good luck - let us know what you figure out!