Wish I could have made it to this talk, but was too busy coding. However, thanks to the power of the Internets, we can timeshift it to... well, the weekend. ;-)
There's definitely something powerful in the approach. It feels more right than a build-it-and-they-will-come mentality. We're still learning too.
Want more on how to startup the right way? Eric Ries, Dave McClure, Andrew Chen, and Mike Speiser are some of the most prominent thought leaders of scientific / metrics-oriented startup approach.
Also, building the tech to track and make decisions like that is almost always custom rolled, which is just a development overhead that ideally could be avoided. Our friends at Mixpanel are working on that -- to help startups apply the same kind of metrics-oriented decision-making done at Slide for startups like yours and mine.