I’ve been doing some minor perl programming to convert the standard MT security code plugin to use plain text rather than an image. This is the same conversion that I did on this blog too, but obviously I used a nucleus plugin as the basis :)
I understand that using plain text is not as “secure” as using an image, but it’s much easier to copy/paste as a user than trying to work out what the number and letters on the image are. I wouldn’t want to make the barrier to entry for posting a comment too hard!