igo 8 warks just fine and no memory issues
I didn't have install any priming software - just detect gps and I was good to go
with iGuidance make sure u have virtual port software (gps gate) installed until their new version comes out - prolly at the end of this year
p.s
why would you try to use bluetooth gps ?? 6800 and touch pro both have fully working gps not agps so you dont need external gps unit
http://forum.xda-developers.com/showthread.php?t=364199