Version 1.1.6 will introduce "news bin" support. A feature that can be found in many of the advanced commercial aggregators, which is a good reason to have it too :-)
If you don't know what a "news bin" is about: well it's like a container which you can use to collect items from the feeds you read. It is similar to the flagging feature (items with set flag are never deleted). It will also allow you to permanently keep items, but additionally you can create multiple news bins for different item categories. Also in difference to flagged items: items in news bin are not deleted when you delete the original feed.