Gyms are also weird. Did a few today, essentially you can join one of three teams (Red, Blue and Yellow). Once you come across a gym that is owned by a member of another team, you can take it over for your team. Whoever is defending the gym leaves on of their pokemon at the gym to defend it, the attacker selects his pokemon to attack and its basically a tap, swipe, hold type deal to attack and defeat the pokemon the owner left behind.
You can also battle at a gym of your own team to level the gym up or something.

I tried driving and playing, the gps is really ****ed if youre going fast (dont know if because beta and ****, or how its supposed to be because youre supposed to walk and play not drive) but I did manage to catch a gastly and pidgey while driving so theres that

maybe, I'm keeping in mind that this is a beta and anything I see is subject to change, however I am certain there will be IAP in some form