ive heard ppl refer to it as interactive fiction? anyone know? 
I’m not sure myself
It’s not very much that’s revealed when you check the pottermore site. I read somewhere else that it should be something like a treassure hunt in the real world and that people could finds wands all over the US and UK, and perhaps also other countries… But this is only hear say…
I heard it was an MMO, but no one seems sure at this point:
http://massively.joystiq.com/2011/06/16/rumor-is-pottermore-the-upcoming-harry-potter-mmo/