I have a license for The Sky - Pocket Edition, but I gave the Pocket PC to my (non-astronomical) father-in-law for Christmas. The Sky - Pocket Edition works great with my Sky Sensor 2000 goto system, but I found I just wasn't hauling that extra piece of equipment out into the field for visual observing, and for imaging I have to bring my laptop anyway. If you are looking for a very nifty program to drive your GoTo scope, then this is the real deal.
$35.00 will get you the license, and the software can be downloaded directly from Software Bisque.
Also, if you happen to have an HP Jornada 520/540 I have a serial cable and gender changer available. $25.00 shipped. See ad #169680