More than an aggregator

Niel M of Feed-Squirrel has noted that the majority of his users are interested in CF ... no seriously they are (only joking Neil) :o)

But what this has made him think, how can an aggregator expand on this and become more of an asset to the community? So if you've been thinking on how you could make a aggregator better than all the others but don't have the time drop him a line in his comments. They don't even have to be RSS related either.