I've got a HP IPAQ 2490 and would really like to add the ability to use it as a phone. As Im currently carrying my personal mobile, work mobile AND pda.

I've seen these CF GSM adaptors but am not sure how good they are. Will it allow me to use windows mobile 5.0 phone edition? or do I have to stick with the software supplied with the device? I also get the impression it wont allow me to use the pocket pcs mic and speaker I have to use a headset plugged into the unit - which suggests the pocket pc serves as just a controller for the unit.

Anyone got / used one?