This doesn't sound like a good idea for an Area 51 activity. The private beta (when we actually launch the site) is designed to set a framework for asking good questions… to prepare the site for opening to the public.
But Area 51 doesn't have the tools available to properly vet and curate that content. These "collected question" authors may or may be on the actual site. So if this collection is going to be used to seed the early site, you risk making the whole thing look somewhat forced and staged. If the seeded posts start to feel like the author doesn’t really care about the answer, the whole exercise would likely be perceived as a waste of time.
I understand your enthusiasm for getting started ASAP, but experience has shown that asking the earliest questions is best left to the private beta founding community. That's what that phase is for.
Asking the First Questions