Cool, thanks for the pic. That certainly clears up my confusion about hacking the creative car adapter. Meaning, I had bought a car adapter from radio shack that had an adjustable voltage switch (mounted within the cig lighter plug) not as a separate box in line.
Anyway, just ran the JB3 using the lm317 circuit for 6.5 hours from the 9.6v rc batt. Just passing along the results.
The only reason I'm trying this circuit is because it looked like a fun little project, otherwise, the "creative" car adapter seems like an easy route, but I also wanted to use hardware that I already had on hand. Now if I could just learn how to transfer this circuit from the breadboard to a chip and solder everything together, I'd be golden.
-john