My goal has been to focus on two use cases: 1. When I return to a popular story on reddit/slashdot/digg I would like to see highlighted the comments that were

My goal has been to focus on two use cases: 1. When I return to a popular story on reddit/slashdot/digg I would like to see highlighted the comments that were posted since I last visited it. (digg is only in theory; does it ever get interesting comments?) 2. When I post a comment on a blog it usually has very little traffic. I never bother returning to see if someone responded to my comment, and would like to be reminded of it only when that happens. [update] All comments most appreciated. I will be only online one hour everyday for the next few days(I wrote this while on vacation travellling in india), so expect responses in 24-36 hours. Thanks.