Once you start carving, the die grinder and the dremel are basic tools. (The Die Grinder is fast, and the dremel is great for tight spots and lighter work.)
Dale Cochoy is the premier vendor of bits for these in bonsai use. I've seen visiting Japanese masters getting very excited at his booth at shows.
See his website at:
http://pages.prodigy.net/dalecochoy/
Then, you can move on to the blowtorch! See Dan Barton's books for details.