I know ya'll are working on the newsfeeds, but this is a cool idea i have seen on socialgo and also grou.ps, an rss newsfeed import where you can add a google search term and up pops random things about said term in the feed.
Also if you could customize it so the newsfeed also imports things to and from twitter also it may help over all performance of the newsfeeds as well.
Blogs: You can also import feeds from blogs, similar to the articles xml file from wordpress (which isn't working for me btw).