Jack Vinson, follows up on my aggregator though exercise. He captures an issue for those of us who use aggregators for situational awareness (my definition): redundancy reduction.
For example, my Findory personalized feed picks up on items from feeds that I'm already subscribed to in Bloglines. Except that I'm already subscribed to them, so why do I need Findory to tell me about them? Having Findory keep track of that is too big a job, but my aggregator should be up to the task.
Memo to Jack. I'll buy next time at Mud.