Well since this appears to be the welcome on board/new user thread. I will keep it going.
Picked up the app yesterday (8/1//09) via the Ismashphone folks I follow on twitter.
Being that I work in a metro area but commute from the boonies (no 3g, limited Edge, not uncommon here in Kansas) I was skeptical of how it would work. In my commute home yesterday and my commute in this morning. I am happy to say the map is looking pretty solid and Waze did pretty good. The app is great and I think has a lot of great potential.
Anyway hello to all and I look forward to contributing to the "Waze of the road" as best I can.