Links
Application Development
The windows mobile programming site contains pocket pc development tools, downloads, and development guides
Dot Net Compact Framework Site
Hello World App walkthrough with Visual Studio
Pocket PC Developing tips for beginners
Sample Application development walkthrough with embedded Visual Basic
Sample Application development walkthrough with embedded Visual C++
The Getting Started from Scratch Guide to Pocket PC Programming
Tutorial on Consuming a web service from your pocket PC APP
GPS
The Official Pharos Pocket GPS sdio product site contains specs and technical information, most importantly indicating that the device supports the NMEA 0183 protocol for gps data retrieval.
NMEA-0183 and GPS Information site contains links and resources pertaining to the NMEA standard
http://jan.ucc.nau.edu/~cvm/latlon_formula.html
http://www.mathforum.com/library/drmath/view/51711.html
http://geography.about.com/cs/latitudelongitude/
http://geography.about.com/library/howto/htdegrees.htm
http://tiger.census.gov/cgi-bin/mapsurfer is a very useful dynamic online map system with GPS information.
http://www.geocode.com is a trial site that gives GPS coordinates for a street address.