I am also kinda new here. Got myself then the family involved a few months ago. We are now obsessed !
Terminator, I use a Handspring with a GPS Companion which I got together on ebay for $99 a few months back. It's a little bulkier than most GPS's.
I mostly use Cetus GPS software. The NavCompanion software has a couple of features the Cetus doesn't so I use it sometimes as well.
Cheers,
Marc