It's Good to Talk

Web 2.0 is all about conversations, they say. So clearly what we need is a search engine for conversations. Enter Talk Digger:

Talk Digger is a web application developed by Frédérick Giasson that helps users to find, follow and join conversations evolving on the Internet.

Talk Digger greatly evolved in 2006. I[t] started being a comparative search engine using the link-back feature of many search engines. Then it evolved in a full-scale meta-search engine reporting web sites linking to another web site. Then it evolved in a search engine of its own: a "conversation search engine" with feature helping the creation of communities around each conversation.

(Via eHub.)