I would've never thought to use the Treo for music-related apps, but I guess it makes sense since you can use a computer to make music these days. I wonder if there are any other tutoring-type programs besides ones for the guitar? And for the geologist and the Drill Sergeant, it makes sense that you would want to bring along a lot of useful info in your pocket (especially the weather) if you spend a lot of time outdoors. Thanks for posting!