See fabrication section for all tips on plastic / dash issues. You'll find lots of experience there.
GPS / maps - Mapopolis gives you free software, and temporary free maps. You can try any map for a week or so, maybe 10 days. Software loads up clean. Go here: http://www.mapopolis.com/getmaps.jsp...3841312&p=&q=5
They had voice directions which were ok. It'd give you like 3 warnings for an upcoming turn. On screen directions are usable while driving. Menus / interface not well suited for car. Recovery from "wrong" turns - which I kept doing just to see how it handled - seemed pretty good. They'd give a little sad tone, and then in a few seconds give you fresh directions. Once in a while it'd be "turn around", but usually it was better than that.
I'm very interested in your experience with GPRS and internet everywhere. Who's the service provider for that? What's the plan & are you happy with it? etc Any suggestions here very much appreciated.
Also, what BT gps device did you get?
Finally, what programming tool(s) are you using for ppc?
OK - off to day job ...