Would like to think that my comment here inspired this post: http://news.ycombinator.com/item?id=433084 http://news.ycombinator.com/item?id=433084 :) As mentio

Would like to think that my comment here inspired this post: http://news.ycombinator.com/item?id=433084 http://news.ycombinator.com/item?id=433084 :) As mentioned there, there are a couple of commercial products besides Google Website Optimizer, one being Optimost (now part of Interwoven). It does a lot more than just simple AB testing but is quite expensive (we were quoted around $10k/month when I played with it at my last company). Genetify looks pretty cool and I'll spend some time playing with it. One thing I wish all these frameworks had is hooks for testing things server-side rather than with client Javascript. This would make it a lot easier to test process flows (i.e. "one-page form versus wizard") in addition to individual page elements. If there are other open-source options out there, I'm looking forward to hearing about them.