Alex has also asked about how SCode is working on my movable type install.*
Awesome!
I haven't encountered any comment spam since I've installed it. There was one questionable comment - but it was put there by a real human - and since the comment was kind of on topic I left it. (If you are that desperate for a link from my site and you go through the trouble of posting a comment that is on topic - I'll let it slide).
I also haven't had any complaints regarding the fact that it only a "sighted" human input validation scheme. So, as I originally said, until I get a complaint I am going to leave it.
But now that alex mentions the SCode implementation - I noticed that I never labled the input field. Which tells me one of two things.
1) People are so used to seeing the little box of numbers they know exactly what to do in order to have their comment posted.
2) People have been getting frustrated by failed attempts to post comments.
I'm going to go ahead and fix that right now.
andre
*see Sighted Human Input Validation