I'm building a vb.net app that tracks all of our property mangers, and workers via Motoloral i730 GPS enabled phone. So far everything is working pretty good except for the fact that the phone has a 10 sec delay window when a user sends data and can't recieve any calls. So we had to resort to a 5 min GPS posting interval to our servers. This type of time interval is not exactly 'realtime'. So I was wondering what kind of GPS boxes that are out there with an simple SDK that I could hook up with to direct its GPS data to our servers, and of low cost. Any suggestions will be helpfull, thanks.