I installed the software updates for the HP all-in-one PSC 2210 for Mac OS X and found that my Printer/scanner/copier could no longer be found via Rendevous.
I have the PSC 2210 plugged into the USB port on my Airport Extreme base station and set up for wireless print sharing. It worked fine until I installed the update.
Uninstalling the update and re-installing from the original software cd solved the problem. It seems the new update does not support Rendevous or wireless print sharing.