Data is required to run either Google maps or Windows Live Search, but the GPS ought to work fine with other software. Garmin has just released the 2009 version of its Mobile XT which is available at
www.buygpsnow.com Don't buy Wayfinder....I tried a 5 day free trial by going to na.getwf.com though the free 5 day trial ought to tell you if the GPS works without a data connection. Try and do this while ActiveSync'ed. Start>Settings>Connections>Advanced>Select Networks and in there, you should have "My Work Network" set up to do this. In "Proxy Settings" check the box that says "this connects to the Internet."