Weighing in at 58MB and available for download at the Pantech site, the update takes you to...
If you HAVE a duo (a handset I'm personally quite fond of), then the update is a no brainger - go get it!
Pantech Duo Windows Mobile 6.1 Standard
CE OS 5.2.19597 (Build 19518.104.22.168)
Radio Version C819.33.
OS Bld. Version 6.11.M044.33
RIL Version 2.02