It's a little difficult for me to relay information right now but a couple things have surfaced in the last few days and nobody has mentioned them yet so I wanted to bring them up.
First is a new trailer, which I don't believe has an English equivalent yet (
http://youtube.com/watch?v=_6blt8m8-3Y) which showcases many aspects of the new games including diving and the Primal Reversion of Kyogre and Groudon when you encounter them. It should also be noted that Mega Stone symbols are now very visible on the team leaders.
Get*TV had a segment on OR/AS and showed the Primal legendaries using moves that were confirmed to be new, not just animation changes.
Finally, events for Diancie and a shiny Gengar were announced for US GameStop stores, both via serial codes. Diancie will be available from the end of October to mid November and trading it to OR/AS will give you the Mega Stone, while the Gengar will be available from the middle to the end of October and will be holding Gengarite.
Be sure to check your favorite news sites for more details.