Did you check the voltage directly across the battery while hitting the starter? If it doesn't drop, start tracing the cables and check the starter relay under the tank and the solenoid behind the right sidecover. If it does, try to get it started as best you can and make sure you have over 13.5 volts across the battery with the engine running 2000 RPM. If you do, the battery is probably sick. If not, your charging system is broken.
Don't forget that the neutral, clutch and sidestand switches can stop it from cranking.
