I don't know about y'all, but I just visit the sites I'm interested in keeping up on. I have bookmarks, browser history, and my own memory to keep me in sync. For a while I used Firefox's live bookmarks, then I started using chrome, then safari. I use the reading list feature occasionally, but my only real "aggregator" is my own memory. It doesn't work for everyone, I suppose, but its a technique I happen to enjoy.