Another free topo tool...USGS Topos in GeoPDF format

[tdesanto]

Something like this?
http://www.geomart.com/products/topo/freeindex.htm

AFAIK, the TerraGo Toolbar does not support Bluetooth GPS units but will support connected GPS' with NMEA output. I'll have to check to see if this has changed...

Thanks! That's exactly what I was looking for.