I’m now on WordPress 2.3.1. It was about time too; I was still on 2.1.

Importing the tags from Ultimate Tag Warrior worked fine. Before upgrading and importing, I quickly patched my local version of WP with a little help from Subversion:

$ svn diff http://svn.automattic.com/wordpress/tags/2.1/ http://svn.automattic.com/wordpress/tags/2.3.1/ > wp.diff
$ blog.bigsmoke.us
$ patch --remove-empty-files -p0 < ../wp.diff
$ svn revert wp-config.php
$ svn add `svn status|grep '^?'|sed -e 's/\?//'`
$ svn rm `svn status|grep '^!'|sed -e 's/!//'`

Then, after a few changes to my template files to play nice with WP’s new built-in tagging system, everything was running again.