Great info Jon and thank you for doing the leg work too. For some reason I can't get it to work for me I'm not sure I've got everything installed with sleepwatcher even thought I went step by step with their readme file. I'll keep trying, but just had to say thank you.
Is it the setting the fans on boot, or wake from sleep that doesn't work?
To see if sleepwatcer is running at the terminal type
ps auxww | grep sleepwatcher
you should see two lines returned one for the grep command, and one for sleepwatcher itself. if you only see one, its not running.
The sleepwatcher install read me install section isn't explicit about how to copy and install the config files, if you look at the upgrade section it has more detail.
to verify the mapMemoryDriver.kext is installed, make sure you can run nvclock from the command line
/usr/local/sbin/nvclock -F auto -f