Sorry, I can't seem to post this response within the same thread.

Thank you both (Zoredache and Gordon) for your answer. But the fix seems temporary. I entered the command you suggested, and it seemed to work:

...smith$ Registering Service ApacheNoDoz._http._tcp.local port 80 DATE: ---Fri 14 Sep 2012--- 12:04:15.813 ...STARTING... 12:04:16.566 Got a reply for service ApacheNoDoz._http._tcp.local.: Name now registered and active

So, I checked for it on my G5:

Browsing for _http._tcp

Timestamp.....A/R Flags if Domain......Service Type...Instance Name

(lots of Bonjour printers omitted)...

12:07:38.370..Add.....2..4 local.......... _http._tcp.........ApacheNoDoz

12:07:45.921..Rmv.....0..4 local..........._http._tcp.........ApacheNoDoz

So, it was running at 12:07:38, at which time the host was asleep. But, shortly after, the activity seems to have been removed. I don't know why. Does this mean that I can never let the cpu sleep, or is there something else I have to set?

Thanks, again.