[Keyword: online journalism]. Some useful tools – coComment, del.icio.us and co.mments – are noted by Easton Ellsworth if you want to keep track of the comments you post on various blogs.
Online Journalism Blog
Comment, analysis and links covering online journalism and online news, citizen journalism, blogging, vlogging, photoblogging, podcasts, vodcasts, interactive storytelling, publishing, Computer Assisted Reporting, User Generated Content, searching and all things internet.
Online Journalism Blog 
Thanks for finding me, Paul. I’ve given up using del.icio.us since co.mments does essentially the same thing, but better.