How about the two 'ACC' power terminals on the Left side of the fuse block? The top is Positive, bottom Negative - use a good #2 Phillips to crack them loose the first time.
There is a hot wire that runs off the iginition switch that is easy to get to. Its under the left fairing pocket in the rubber boot with the plug for the MP3 plug line. I recently purchased the Sierra Electronics Sirrius Satellite setup and that is where it plugs in for power. Comes on and off with the ignition switch key. Plug from dock to connector for MP3 (brown plug) Hot wire goes from dock to red plug. Make sure that you have the appropriate fuse in between. Sirrius radio's operate on 5 volts, 6 volts, and I think 8 volts. 12 volts direct will kill one. If you need the wirtten directions for the kit, I can scan them in and send them to you if necessary.