Ok, so there is an applescript that can decode MacOS passwords and also some C code and now we have Decrypt-a-tron (written in RB). What do u do well you type in the encoded password (no spaces please) and then hit Decrypt and thats it. It is much faster than that applescript.
I intend on adding this to MK in the next week or 2 but I never stick to dead lines so it could be next year the rate I work!
For more inf. read the included text file (from securemac.com).