I have my GPS and Sat Radio wired up on the Busa.
I bought an accessory fuse box from Blue Sea, powered that off switched 12v power through a relay, and wired everything to the fuse box.
There are some nice aftermarket fuse boxes out these days. Some even have the relay built in.
Eastern Beaver Fusebox
Fuzeblock
I didn't photograph my installation unfortunately. I need to wire up the KLR and BMW soon though, so I'll be sure to do a how-to this time.