Earlier quoted context omitted.
What kind of a/b testing tools are you using? Homegrown? Optimizely?
Homegrown at this point. Nick built it :) We were using kissmetrics, google site optimizer and google analytics. All great tools but as we are growing we didn't like the delay in the data and didn't trust all the data integrity. He is thinking of open sourcing our optimization engine at some point in the future. Any interest?
Would definitely love to see this as well.