Why is it that, in absolute opposition to the last fifteen years of software industry trends, there's no way to try an iPhone app before you buy it? How do I know which of the six dozen different Solitaire apps I want to buy if I don't get the chance to play any of them first?
You'd think it was a no-brainer. Every App Store application is wrapped in DRM1 anyway. Presumably, it would only take a minor software update and Apple could wrap downloads in 30-day time bombs, just like they do with rental movies, without any need to change the apps themselves.
1 I know I should get up in arms about the closed-source, walled garden, DRM-wrapped, "it's not your phone it's ours" nature of the iPhone, but I can't muster the energy. It's a shiny toy that in a few years I will replace with another shiny toy.