Does anyone know if the credits, ships and upgrades we earn(or steal) in the beta will transfer over to the full game?
They won't. Everything will be wiped before formal release... probably more than once.
They certainly won't transfer into the full game, although interesting that Frontier are going to some effort to ensure that there is no wipe from PB1 to PB2. I am guessing that they lose a good few players (at least for a while) every time there is a wipe, fatigue sets in if you have to grind from the start every time.
G
Only the transition from gamma towards the retail version will keep its profits. If there is no major bug
I would expect us to get maybe a couple of days (up to a week) of play time before the game launches to the masses