So back in October, I began working on another little side project
involving personalized meme-tracking.

Basically, my software can take an OPML file and generate a clustered display similar to memeorandum. Over the last couple
of days a few other people have mentioned similar ideas – in particular Robert Scoble mentioned
Megite, and Dare Obasanjo asked to “able to provide it the OPML for blogs.msdn.com and have it show me what the hot topics were among Microsoft bloggers”.

So here's a screenshot, using http://blogs.msdn.com/Opml.aspx as a source:

It's not available to the public yet – I haven't had time to work on a few scalability issues yet.
If you'd like to discuss this, though, email works: nlothian at apache dot org.