Syndicated Comments
Adina is working on syndicated comments done correctly, for a change (so you could get an RDF feed from individual threads of conversation rather than ALL comments from a particular site). This would allow me, for example, to keep track of all the places I've dropped a comment. I could subscribe to each individual comment stream and look out for replies, etc. I could also syndicate all these feeds on my blog so that my readers could see the conversations in which I've participated (or even those which I just find interesting) on other blogs...
My current solution for preserving / reusing / exploiting elaborate comments I make on other places is to copy and paste the text in a new entry here. That's an awful solution because it loses the context of what I was writing about.
If Adina gets her hack working, I would be ecstatic to help her beta test!