It would also be good to find a way to weed out duplicates. The last time I looked, there were already four different feeds for I Can Has Cheezburger, and Daily Kitten and xkcd were duplicated too . I expect that happens more frequently in the less-subscribed end of the list. People will get bored of looking and create their own feed, thereby hogging usernames and making it even harder to find the small things at the end of the list.
Re: search feeds
It would also be good to find a way to weed out duplicates. The last time I looked, there were already four different feeds for I Can Has Cheezburger, and Daily Kitten and xkcd were duplicated too . I expect that happens more frequently in the less-subscribed end of the list. People will get bored of looking and create their own feed, thereby hogging usernames and making it even harder to find the small things at the end of the list.