I noticed you mentioned Outlook at the end of the post — are you still looking for a solution that works there? If so, you should try out Attensa’s RSS reader for Outlook (it’s free). You can sync your feeds between Outlook, the web, and your mobile phone. Plus, the reader has power-user features like syncing with your del.icio.us tags and automatic prioritization of feeds and posts you read the most. Download it here: http://www.attensa.com/products/outlook/

Cheers,
Paul and the Attensa team