Hey Guys. First off, I'm extremely excited by all the possibilities I've been seeing in the documentation.
One thing I found out through trial and error is that you can only build apps for sites where you are the owner. At our company, we create all of our client websites under a master user account, then add the developer (just me) as an admin contributor. That means that I don't have the ability to create apps from my alpha-approved user account.
I know that this may be alpha specific, since you want to limit the exposure of the app so early, but is contributor app creation a future plan?