As a diehard TomTom fan, I'm really disappointed with the delay. I have bought Sygic and Navigon since.
Sygic uses Tele Atlas (same as Tom Tom's) while Navigon uses Navteq.
Tele Atlas is IMO far better in Australia and Europe, but Navteq is good in US.
So, for me (I'm in Australia), Navigon is way better than Navigon. Navigion Australia is really bad IMO. No speed warning capability because none of the roads's speed limit is in the map. No red light warning. No speed camera warning. Also, the POI database is extremely limited and out of date.
Sygic is really very good. In fact better than the TomTom 7 in my HTC Touch HD. (I'm talking about map data quality here).
So, yah, I've given up on Tom Tom, despite swearing that I would never consider anything other than it.