Phillip Pearson just posted the first version of the Internet Topic Exchange, a very cool service that enables the creation of composite blogs out of trackback pings. [BookBlog] Adina has created an Austin Blog Demo using the Topic Exchange. There is also a Social Software Topic Exchange and more. This is an outgrowth of the Ridiculously Easy Group Forming Wiki.
This is a great micro-service that fits an unmet need -- aggregating conversations. If you have trackback (still don't know how to do this in Radio), posting to the composite blog is automated. If you don't you can manually refer to the post on your weblog.
I am setting up a Topic Exchange for the Blog Network. Any Tribe/Network members interested in occasionally contributing posts that relate to the activities concepts of the network?