It's interesting you should mention that, as that's something I've been playing around with. On Windows there's something called POILoader, but being a Linux user I've never played with it. On the Linux side (or Mac OS X) I've been playing with google maps and google earth and getting them to spit out a KML file, then using gpsbabel to make them into gpx files. If anyone is interested I'll start another thread documenting my steps, so we don't accidentally hijack this thread.

-John