So, according to the Smackdown spoilers for this week, Vickie Guerrero did indeed strip Edge of the World Heavyweight Championship, and hand it to Dolph Ziggler. Teddy Long then returned and said that he would allow the title reign to stand, but then booked an immediate title match between Edge and Ziggles. Edge won the title back, at which point Teddy announced Ziggler was fired from Smackdown.
So Dolph Ziggler is officially credited with being World Heavyweight Champion.
And there is now an opening in the Smackdown chamber match on Sunday. I'm sure some people are speculating that the Rock may fill the spot, win the match, and then down the line have a cross-brand feud with Cena. I very very much doubt that. Much more likely that either Ziggles will find a way back in, or else Kevin Nash will be brought back in to fill the spot.