Well, comment spam on blogs simply must be an epidemic, as it has found my sorely under-used blog today.  As such, I went searching for a simple .Text solution, and after a little GoogleFu I found a solution at :

http://blogs.clearscreen.com/migs

Miguel Jimenez has been kind enough to implement a simple user-control which I could add to the .ascx for my comment posting whichin turn provided quick and easy CAPTCHA like protection.  This will stop the 'bots from posting, and if I need to do more later, I will.