Keep track of your comments on other sites using the cLog API.
Comment Log (or clog) is a plugin that allows you to store a copy of a comment you make on another site. This is done through implementing the RESTTA-based cLog API. As long as the remote site supports the API, you can keep track of any comments you make. This plugin also allows those that comment on your blog to keep track of their comments. The full details about the cLog spec can be found HERE