I'm in the middle of an upgrade from Wordpress 1.2.2 Mingus to Wordpress 1.5-Beta-2005-01-17 (which has already been replaced by Wordpress 1.5-Beta-2005-01-18 as if I care). There are quite a few structural changes for the better, but because I am using a beta release, and a nightly build at that, upgrading is not a simple task. In particular, I have to rebuild most of the page templates and style sheets.
There will be a better structure at the end of this, as well as... wait for it... podcasting! But I'll finish this off after a good night's sleep, if such a thing is possible.