Self Adjusting RSS Reader?

Does anyone know of an RSS reader which adjust the order of your feeds depending on which feeds you tend to click on / spend time reading?

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If you read this site through a newsreader, I have an (important) announcement for you. There are two site feeds available: an RSS feed and an Atom feed. If you would like to receive the full site feed, subscribe to the Atom feed.
Google Reader is an excellent blog reader, among whose strengths is that it resides somewhere off your computer. This means that you can read blogs from several machines without having to mark a lot of old entries as read.
Last week we reported on our site statistics after going to a full RSS feed. The results were disappointing; our numbers went down.

NetNewsWire (FeedDemon for Windows users) offers an sort by feature where you can sort by name, last update, manual and "attention" where the software computes which feeds grab most of your "attention" (or least of your "attention").

I'm a big fan of Google Reader, but unfortunately it doesn't do this, even though it does track trends in your RSS browsing history.

They could get a lot of mileage by simply prioritizing items depending on what percentage of items you have read in a given feed.

Or if they could add a star rating system...you could rate your own feeds, from one to five stars...five star feed items could come first.

Another feature I'd like to see, is something like what Google News does, and that is to group related items from different sources together, and present a single headline for the lot. If you subscribe to many science/tech feeds, for example, you'll notice the same content repeated many times.