serial port is not dead
I've written this little piece of PocketPC software during my research on IrDA usage on PocketPC devices. It turns IR port of your PDA in to plain serial line (you must disable "Receive incoming beams" option first). Written in C#. It worked well with iPag and PocketLoox.
Let me know if you have some problems with it on other devices.
Download source codes and binnaries (compiled app is in bin\release folder).
Download .NET Compact Framework 2.0.