Allthough the 3com site says nothing about this, and all documentation is to the contrary, I did manage to get IR synching working on my Palm IIIx. Am I alone here?
Goto the IBM site for their workpads, and look for the workpad synch software. Install it (via cradle or modem),
then do a soft reset, then choose Prefs/SynchPanel, and set it to IR.
I have a IBM 560x, so I installed the Driver from IBm's site for Windows NT 4.0, enabled the IR in the thinkpad tools, rebooted, installed the Palm Desktop Software, and Synched away.