Any good email marketer knows- A/B version testing isn’t just a great way to determine what your customer responds to, but it’s a given and measurable way of using email to its nth abilities.
New entrepreneurs and app developers have the same issues- testing to find out which is the most effective UI, price, button, pitch, etc. I’ve built out a few of these sites with version testing, not thinking much of it. For a talk I gave Saturday, I built a more scaled down version as an example. It also includes some specific button or item testing. The code is open source and available to use, reuse, etc. Enjoy! Feel free to branch, fork, etc. and add on some other tests- just this morning an entrepreneur with Women2.0 Labs added on randomization. Great!
http://github.com/banane/markettools
More prototyping resources