After a long wait Google has made Google Mobile App available for Windows Mobile.
Here is how you can download it on to your phone:
Visit m.google.com using your Windows Mobile and follow the instruction.
Google Mobile App is currently available for all devices running Windows Mobile in the US, UK, Canada, France, Italy, Spain, and Germany. It is also available for iPhone, iPod touch and BlackBerry devices.
If you don’t see a download link when you visit m.google.com, then your Windows Mobile device does not support Google Mobile App. [Google Mobile Apps will support more devices soon.]
The advantage of using Google Mobile App, is there’s no need to wait for a browser to open to begin a search, and with search history available to reduce typing, you can get your search results with fewer clicks than before.
You can also access your other favorite Google services like maps, docs, email, calender etc using the Google Mobile App.
Source: googlemobile blog