The Internet Topic Exchange, an implementation of Ridiculously Easy Group Forming concept, powered by Trackback, providing a centralized tracking of discussed topics/subjects/ideas. The idea is like: you post in your blogging tool, attach it to a topic/subject, public it somewhere, and ping the centralized place (e.g. TopicExchange), then users could have a list of discussed posts in their view. Better yet, linking this to blogging tool, blogger read the list of posts on certain subjects while blogging (via XMLRPC, SOAP).
It's still stage of experiments. You get new things everyday in Blog. Cool.
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