I've now done an extensive cleanup on the site to remove spam comments. I should have been able to filter out and delete only the spam comments, but as always, the human mind is fallible... even mine... so if you're missing a comment you remember having written, I'm sorry, but it's been zapped. You could always write a new one, of course.
In order to try to prevent spam filling up this site in the future I've implemented a new CAPTCHA from the free (!) service called reCAPTCHA. I hope this will be good enough to hold the spambots at bay.
If you're one of the people sending spambots to my site, remember the wise words of modern day philosopher geek Wil Wheaton: Don't be a dick!