For those who don't know, for my day job, I work for a mass property appraisal company (yep, we're the ones that go around to every house and reappraise the entire county or city at one time every few years.)
I came across this to use for an uncomming project:
http://chicagomap.com/MapOCXPro/MapOCXPro.htm
It looks kinda like Destinator but I discussed some of the routing problems I've had with Destinator/Map Monkey (like being told to exit the interstate and then get right back on.) and they said it definately doesn't have those problems - we'll see though.
Anyways, I'll probably mock something up for my car, but I was wondering if anyone has heard of MapOCX. I bought the SDK for $450 and will have it next week. There is a per seat license cost of $120 after an application is written with it.