Great! This seems to have resolved a problem I was having using a drive on my Airport N Base Station to do Time Machine backups.

The PowerBook is 10.5.5, the Airport is 7.3.2 IIRC.

Symptom:
Put the PowerBook to sleep whilst Time Machine is running and the Airport would puke on any further filesharing, Airport Utility would have problems connecting to it. Internet connection would remain okay.
Until the Airport is reset, no further Time Machine backups possibe due to the filesharing FUBAR.

After this hint:
Put the PowerBook to sleep whilst Time Machine is running and Airport filesharing is unaffected. Wake the PowerBook and you are greeted by a Time Machine dialogue informing you the network connection was lost.

Note that I did not edit the rc.sleep file, I just put the hint commands into ~/.sleep (along with #!/bin/bash )and did a chmod a+x on .sleep

I installed both sleepwalker packages, though no idea if I needed to or not ....