Over the years, NewsGator Go! has remained one of my all time favorite mobile RSS feed readers. The mobile client app to NewsGator's popular RSS aggregation service was been available for Windows Mobile, Symbian, and Blackberry for some time now. And while the iPhone may not support third party software, yet, Newsgator provides a mobile web accessible service that supports iPhone. Just point Safari (via iPhone) to m.newsgator.com and login to your NewsGator account. From there you can access your feed through a simplified web interface optimized for iPhone. Enjoy!