While we knew that Nokia Maps would be arriving on the full range of Windows Phone devices, Nokia indicated that its Drive voice navigation feature would stay an Espoo hardware exclusive. Alas, it seems that enthusiastic WinPho meddlers had other ideas, already managing to transplant the Lumia series' voice navigation functionality to Samsung's Omnia 7 -- and presumably any other handsets they'd like. No video proof's been unearthed just yet, but it looks like Nokia's first foray into a shared OS may require a tougher software lock-down.
Microsoft Windows Phone 8.1
Microsoft Windows Phone 7