The popular Windows Phone RSS reader, Wonder Reader, has been updated to version 2.0. The update makes the Windows Phone app compatible with Mango and includes these new features (for Mango devices):
Live Tile support: The tile will display an unread count up to 1,000 plus the latest headline and image on the back of the tile. The Wonder Reader tile is set to update every thirty minutes.
Pin feeds and categories for additional live tiles: Additional Live Tiles can be added to your Start Screen for your more frequently viewed feeds or categories. This feature is only available on the paid version.
Social Network Sharing: You can now share articles on Facebook, Twitter, Windows Live and LinkedIn.
The Wonder Reader update also supports Mango's fast app switching for instant resume. There is a fully functional trial version available for Wonder Reader (won't support the additional Live Tiles) and the paid version runs $1.99. You can find both here (opens Zune) at the Marketplace.
source: Wonder Reader thanks goes out to Anthony for the tip!