You may or may not have noticed that our feed was throwing weird errors for the last few days. If you did, those errors should all have gone away. There was a glitch on FeedBurner's part (specifically, the half-or-so of FeedBurner that runs on Google's servers) that took a little while to track down.
Apparently it was (and likely still is) pretty wide-spread, affecting many publishers. The problem started after I migrated my FeedBurner account (which contains this site's feed as well as my own blog's) to Google's servers. The nitty-gritty technical details are (more or less) spelled out on my personal blog in a very rough, quick post, if you're so inclined to read them.