Do you use SPB Shell? I have it on my HTC Advantage. Why? Simply put, it offers a better UI experience than the default Windows screen navigation. The new version brings some interesting changes, namely the replacement of Google Search by Microsoft Bing. A trial is available @ http://spbsoftwarehouse.com/pocketpc-software/mobileshell/
That is great news for U.S. Citizens, yay. Microsoft added a "Navigate" button that makes Bing calculate your route. If you have your Windows Phone on the main carriers in the U.S., then you are lucky enough to use the voice guided navigation.
I just checked on MarketPlace and it is still showing the 2009 version of Bing.