I've been looking at buying a Bluetooth gps locator for my 650.
Today I found out that my treo has gpsOne support.
I was wondering if there is any gps navigation software out there that can use gpsOne rather than an external GPS locator.

Some info on gpsOne:
http://www.phonescoop.com/glossary/term.php?gid=125
http://en.wikipedia.org/wiki/GpsOne