Some buddies of mine are doing this little rss mashup thing called feedables and they ask me to check it out so I went ahead and built riafeeds.com with the simple feedables admin web app. Essentially it allows me to look at some of the best content on the web covering Rich Internet Applications in one clean HTML page.
screen shot of riafeeds

The feedables concept other wise known as single-page aggregation. Other examples of this are sportsnipe and Guy Kawasaki's alltop.com  

Interestingly, you can also catch Guy interviewing Steve Balmer at Microsoft's MIX08 conference.

Cheers