It is very clearly a better feedback than Google ever gets. BTW I don't think it does a "small thing". It is not a smaller problem than search itself. I think

It is very clearly a better feedback than Google ever gets. BTW I don't think it does a "small thing". It is not a smaller problem than search itself. I think the most natural UI for this are feeds though (not email like Google Alerts and not a standalone site like Pressflip).