The mobile application seems to be a beefed up, release version of the Yahoo! Go version that was previously released, combining various elements of news, weather, sports, stocks, email, and Flickr photo browsing. You can learn more and get notified of when the Windows Mobile version is released via Yahoo!
The application, and the video from PhoneScoop, which was re-posted by MobileTopSoft, looks promising and combines various elements of Yahoo! services if that’s what gets you going. There is an RSS feed, editorial headlines, and other Yahoo! content readily available.
Additionally, you can also access the content via a web browser and not have to install an application. That feature, as well as the applications, should be available at the end of March 2009.