First push-Instant Messenger (IM) apps, now Turn-by-Turn Navigation? Can our long standing dreams finally become reality?

A few days ago we mentioned Gokivo + Yahoo! Maps had made it into the App Store. Now it's joined by:

AT&T Navigator [free - iTunes Link] provides an iPhone front end to AT&T's $9.99/month subscription service.

MobileNavigator Europe ($94.99 - iTunes link) features Reality View Pro, Lane Assistant Pro, Speed Assistant and Day & Night Mode component as well as the opportunity, to show POIs along the route. (See YouTube for the gist)

What's interesting from a user-perspective is the ranger of options we'll likely be seeing: either free or $0.99 up front and ongoing subscriptions, or more expensive up front (will $100 be the price point?) and no subscriptions -- though will we have to wonder about charges for updated maps eventually?

What's your preference?