I just found this tut while surfing today, sounds really cool and I thought I'd share :
http://www.instructables.com/id/Sponge-Ferric-Chloride-Method-Etch-Circuit-Bo/
Julien
I tried this tonight, but it didn't really speed up the process much. My boards are 2oz copper, though, so that may make a difference.
The wife came out to the garage 3 times to ask me if I was about done messing around during the etch. That's probably only 1 less "are you about done" than I'd get with a normal etching process ;)
On the plus side, I now have a freshly etched Sea Urchin, Snarkdoodle, (yet another) 808, and a couple of Road Rage boards all ready to be drilled and filled (http://fc07.deviantart.net/images3/i/2004/146/9/1/Two_thumbs_up.gif)
The wife is my time unit too ;)