I've been working on an Automator script for converting podcasts into something that my iPod will recognize as an audiobook (and thus let me control the speed of playback). I've been using the script that Dave left in the comments to my post on speeding up podcasts as a model. So far, no luck.
The script (see PDF) runs and seems to do what it's supposed to (no errors), but the M4B files it produces aren't recognized by my iPod as audiobooks. My script isn't exactly like Dave's because I've played around trying to get things to work. I'm not sure what's wrong and the information I've been able to find on the 'Net hasn't helped much.
If you're interested in helping, here's the script and the file it produced.