What would be a fun blog visualization hack to see if I can still get the hang of it?

- Download the XML feeds for my blog and my friends’ blogs, hacking RSS exports for them if necessary.
– Perform either Bayesian or Kohonon self-organization clustering on the topics.
– See how the topics cluster and who posts on what.
– Figure out, based on that, where my interests lie…
– … and alert me when new posts are made that are close to those topics.