You'll see a message to this effect when you submit a comment; I'll do my best to get to the queue multiple times per hour for today, just to see how it goes.
I know this isn't ideal, but it seems better than the broken captcha system that resets the captcha characters every time you preview.
Update: If you've published a comment in the last 18 months, you're now auto-approved, so you won't see a captcha, and your comment won't be moderated. This means it should be easier for you (instant comments!) and me (I'll only have to review new commenters' first submissions).
-rob.

