Upgraded to WordPress 2.3
Surprisingly, the upgrade went pretty smoothly. While dinking around in the admin section, I noticed:
Akismet has protected your site from 15,874 spam comments.
Man, I hate spammers. The more popular my domains get, the more they get targeted. One of my other sites was used as a forged from address in a bunch of e-mails and I got all the bounces. Thanks for checking SPF everyone. 
Update:
Ugh! Damn it.
WordPress database error: [Table 'wp_post2cat' doesn't exist]
SELECT cat_ID AS ID, MAX(post_modified) AS last_mod FROM `wp_posts` p LEFT JOIN `wp_post2cat` pc ON p.ID = pc.post_id LEFT JOIN `wp_categories` c ON pc.category_id = c.cat_ID WHERE post_status = ‘publish’ GROUP BY cat_IDWordPress database error: [Table 'wp_post2cat' doesn't exist]
SELECT cat_ID AS ID, MAX(post_modified) AS last_mod FROM `wp_posts` p LEFT JOIN `wp_post2cat` pc ON p.ID = pc.post_id LEFT JOIN `wp_categories` c ON pc.category_id = c.cat_ID WHERE post_status = ‘publish’ GROUP BY cat_ID
Yes, I ran the update which supposedly updated my DB. Lovely.
Update 2:
Apparently I need to update my Google Sitemaps plugin as found in this thread: http://wordpress.org/support/topic/135564