Obviously, Cass is my first name and P is the first letter of my last name, so...

I've messed around with Caspian Music and CassP and Music, but the name of my band is Token, not Tokin'. Soometimes people ask if we're the 'LionSleeps Tonight' group, but we're obvioously not.

cassp works for me, cuz it's almost always available - except on hotmail or yahoo.