I just saw this on the ExpressionEngine Site, and thought this was a great idea.. Why not have an image verification system, where an image is displayed, having a number inside of it, an the user has to type in the number in order to proceed.
I think this would limit the comment spam, so only humans can do this, and only do this one by one.
Other web based scripts, including, I believe phpBB (or one of the other BB's) for their registration process..
It could be a 2-3 digit number, so it wouldnt be a hassle, but would still prevent spam..
What do you guys think?