Someone recently asked me via Formspring if guest commenting was going to be turned off forever. I was having a problem with spam comments a while back, so I disabled guest commenting; however, it's been turned back on as of this morning. I've also switched on comment moderation for any posts older than 14 days, so that should help as well.
Thanks, whoever you were, for reminding me. I do want everyone to be able to leave comments here. You can also always reach me via the Formspring link at the top right, or by emailing me at insatiabear [at] gmail (dot) com.