I've just tried the Black version!
Not did much, named my trainer, taken my starter, battled with the rival (now seems to be two of them, one takes the unadvantaged Pokémon and the other the advantaged one), recieved my Pokédex, learned how to capture Pokémon, captured a Normal Pokémon, saved the game.
Also...my Pokémon doesn't get EXP, wich is an anti-piracy thing. That doesn't really matter, I wanted just a preview and anyway I'm sure that someone will fix it soon.