I'm yet to use their framework, but am going to integrate it into my next project and these reporting features look very attractive from a production perspective - and for free!
Does anybody know their business model? It's such a good idea but I have no idea how it wouldn't be making massive losses.
This blurb on TC briefly mentions a little bit about it: http://techcrunch.com/2011/01/20/testflight/
My guess is an eventual business model is for advertisers (the true customers) to get user information from developers who opt-in. Getting a mass-load of app developers, each with their own end users, into your ecosystem provides a lot of data to sell.
One feature I'm particularly jazzed about is the logging capture support. It is so painful to explain to test users how to capture logs on iOS!
