I’ve also run across an interesting non-Ubuntu project that is worthy of note. Open Street Map is a project to collect GPS data and make public domain (GPL/CC) maps.
It already has a fair number of entries for Europe but needs some help for other country, especially the USA which is almost non-existent. For any serious GPS user, especially those who are Geocachers like myself, this is great way to help others. I encourage everyone to go have a peek at what they are doing.