Snapped my clavicle two years ago hitting jumps that were way to big for my skill level. LOL
@TintedOut - Dude...same exact injury happened to me last season. Not jumps though....moustrapped on a sheet of ice and broke my left clavicle. Had a pin in it and everything. Probably the worst pain in my life.
For the OP - I'm no doctor but I'd be wary about riding again immediately after its healed. You will have NO muscle mass, which means no buffer for it if you do hit it again. Plus, that area of the arm - geometrically - is very dynamic, meaning you use it a lot and it can go in many different directions, which will autmatically make you're recovery time longer or shorter depending on how much you use the arm. I dunno, my 0.02.