That's pretty cool! For you guys with Palm OS PDAs, you might be interested in this one:
http://www.carcaresoftware.com/
Similar features, same price. The nice thing, of course, is that you can make entries into your PDA and then synch them up with the PC. Very nice for keeping track of mileage and maintenance on the road. Use the demo first, though. Older PDAs with <8mb RAM sometimes have problems with crashing.