IE Search Switcher For WP7
For WP7 device owners, XDA forum member GoodDayToDie has come up with a tool for quickly changing the search engine used when you hit the hardware Search button from within Internet Explorer.
The initial release allows you to use the search provider that comes pre-configured on your phone, or the built in Bing application. If you have manually added any more providers, you can also switch between those.
Future releases will likely include common search engine options, the ability to add new search providers and the ability to edit or delete existing providers.
Supported devices so far include the HTC HD7, Samsung and LG.
For more information and to download the XAP file, check out the application thread.