If you're lucky and didn't nick the cover during your getoff, it might just be the gasket. I had that gasket leak on me. Wasn't even torn, just deformed a little. It's very easy to just take that cover off and have a look. Directions are in the service manual you can download from the board. My advice is: 1) buy a new gasket in advance (so the bike doesn't have to sit after you remove the cover until your dealer orders one). 2) Use the service manual and remove that cover. 3) Inspect both the surface on the engine and the cover, as well as the gasket, for any irregularities. 4) If the problem isn't obvious at this point, that new gasket should do the trick!
EDIT: Take the lowers off and give it a real good clean first and see if you can tell exactly where the oil is coming from.
EDIT: Take the lowers off and give it a real good clean first and see if you can tell exactly where the oil is coming from.