I don't own an ipaq, so take this with a grain of salt: As far as I know, your device runs Windows CE, right? The different pilots are designed to run with PalmOS devices, so they aren't likely to do much for you.
When people talk about the ipaq being well supported by Linux, they mean as a host system - if you ever want to install Linux on your device, you should find it relatively easy.
That said, there is software that lets you connect your Linux machine to a Windows CE device; you could try
synce, which appears to be the standard application for that purpose.
Good luck!