Not even sure how I found this. However have been looking at visualwebsiteoptimizer.com today.
In short you can pull blocks of your page around, remove sections, in a wysiwyg way and split test the results. If it works how it seems to this could be a great way of either:
a: Introducing split testing on some sites quickly to test layout ideas
b: Proving to clients that their ideas are shit
It seems to have some considerable limitations, but anything that can put together a split test in under a minute is interesting to me.
We've been using it for awhile....it's a great product. Extremely simple to use