1) Is there any info about wheter there is a possibility to have private apps that nobody can execute or see in the golem "app store" or is this impossible by golems design (eg. because every node has to have the app to compute the data)?

I guess most companies that rely on powerful computations are not willing to share there software that they developed for years.

2) When I'm writing a software that I want to execute on the golem network do I have to write any specific threading code? How does it work that my binary executes on so many different nodes?

I mean one function will require the the result of another function. So it makes no sense to send the result of the first function over the network (in order to continue processing of the second function) instead of continue   processing on the same node. This all makes not sense to me.