Technorati just gets better and better.
Relating news events to comments being written about them by Bloggers was one of the aims of Newsblogger the joint project between Moreover and Blogger.
The interesting thing about this is that aggregated comments are useful to categorize news and add valuable metadata. The end goal is that comments about a story enrich that story and that the process is recursive i.e. comments can be about comments, eventually providing an ecology of news.