I totally agree that the more ethical way to do it is to offer a "demo". I'm not against IAP just the unethical way some people are using it. Maybe Google need to look into new tags such as "In App Consumables" and "Un-lockable Features"
I've just uploaded a new project to Forrst, looking for some feedback. It's an overhaul for the Met Office Weather App on both Android and iOS, I'll be releasing a blog post about it soon. You can view it (and comment on it) here: http://forr.st/~GlA