I've also put Palm Planetarium on my Clié. I was delighted by it, and immediately nipped out to look at the night sky. Yeah, well. At some point we will be in a field in darkest Lincolnshire, and *then* it will work.
When I was eight or nine, I would have thought this was just about the coolest thing of all time. Even now, people who are that way inclined see this as the killer app for the Palm. (FAQ: "help! My screen is too bright!" Not a normal complaint about Palms).