OK, I know that I don’t look like a hacker. But I was just at the Technorati Hackathon — (or was it Hack-a-thon?). I borrowed Rich’s PC (well, it’s actually a Mac) and did a little hacking. I learned about IRC, sortof, and Matt and I chatted about WordPress.

We were talking about tags, categories and trackback, and Matt reminded me of, TopicExchange. At first glance, TP seems like Technorati, but without the delay of crawling — but also without the benefit of search. Ahem. But it does let you view by posts and pivot on tags (categories). They have an XMLRPC interface, so WP could be set up to ping TP for each category on a new blog post. I think that I’ll do that later on…

I was thinking — would it be useful for something like Technorati to support tags/categories? It might.