Some days ago I was in touch with somebody from MSFT United States who developed a Windows Phone app to follow the Office Product Group blogs. Some colleagues and I told him that it could be great if he can spread the availability to the world instead to US only. Now it's the day.
The app it's called after Office Blogs and it's RSS viewer that allows you to browse the content by product on Windows Phone 7.
You can download it from:
Héctor Calvarro Martín. SharePoint Dev/Core. Microsoft Support Escalation Engineer for EMEA