ha! found a fix for the twitter tools category issue. you can either edit your twitter tools plugin manually, or just grab an updated twitter tools for wordpress 2.3 plugin. surprisingly enough i stumbled upon the fix while searching for blog_post_category. the addition of tags in wp 2.3 changed the wpdb structure… i guess i should go find updated docs.
update: i just re-checked alex king’s site. there’s a new beta for twitter tools (11b1) out. sweet. alex king is definantly a site you should check out if you want some wordpress ideas or useful plugins.