I am acutally building an all-in-one converter box. It is a 7805 chip and a chunk of breadboard inside a small project box. I am going to make it so that it can connect in on either a 9v alkaline (internal), a 4-pin 6v SLA(external) or a 7.2v-9v RC pack (external). For the out's: USB, 1/8" mono, and an adapta-plug connectorfor JB3 or my IPAQ PDA. I'll snap a few pics once it is done. I just have a lot of other crap going on right now and it is only about half built.