cocomment
CoComment has been updated and is well worth checking out if you comment on a whole range of blogs and can never remember where you left a comment and then miss the following conversations.
CoComent is a popular browser tool for tracking conversations in the comments sections of blogs. It catches the comments you’ve made around the web and comments made after yours. It was initially launched in February. Late last night West Coast time, the Geneva based service made a major upgrade, largely in response to user requests. The improvements were much needed.
Most important is that CoComment will now track all comments made after yours - not just comments made by other CoComment users. That was a deal breaker in the past - now the service has made itself truly relevant. Competing service Co.mments has had this feature for some time. New player in the space Commentful does the same thing but appears to offer a simpler feature set for more casual use (30 item tracking limit, blinking notification of every new comment)