I'm another Garmin eTrex user. I haven't hooked mine up to a PC yet, mainly because the interface cable costs quite a bit. I only use the GPS when I have to, or if I have a relatively complex route planned between sites.

Here's the eTrex page off the Garmin Web site (you probably already know about this):

http://www.garmin.com/products/etrex/

Kammer x