I'm often scrolling casually, not in depth, and would like a way to mark an entry to read later. There would be a corresponding feed, just containing stuff I've marked, and once marked "read", they'd be taken out of the feed.

Ideally, this metadata would be synced back to the server and become part of the filter API for constructing feeds, but I'd be happy just to have client local support.

My current work-around is to bookmark items. This overloading of the bookmark feature is awkward, though.