additional to what guanajuatouk said...I would love to see an Android version...I've just bought an Asus eee Pad transformer...16 hours of battery life, GPS, Android 3.0...could be the ultimate geocaching tool if there was a GeoScout to run on it...
...however...you can still buy old HP iPAQs on ebay very cheaply and easily...so the broken PDA is not really an excuse. I'm just about to head to France and of course will be geocaching...I've now cached all the google maps of varying resolution into my iPAQ as my main caching tool running GeoScout. Although I will be packing my ASUS eee-pad, Garmin Edge 800, Nokia E5 with full Europe maps and some poor excuse for geocaching software...the only app I really can trust (even when it breaks connectivity with Groundspeak) is GeoScout.
I noticed Stuart put my "face north" static positioning idea on his development list and am waiting very eagerly for that feature...nobody else has it