For my telemetry link, I use a 802.11 CF card. The only real drawback
> to an iPAQ compared to a Cerfboard is the single serial port. I really
> would prefer a solution that had more RS232 ports for the inertial
> sensors, GPS and magnetometer devices.
One possibility is to add a PCMCIA expansion pack to the IPAQ and then use a PCMCIA card such as
formatting link
Another possibility is to add a CF expansion unit to the IPAQ and use a CF card such as
formatting link
Keep in mind dual card versions of ach expansion pack are available.