We haven't completely decided yet. It's probably going to depend on how many pre-Cataclysm questions we still get when the beta rolls around. Can we justify running both? Do we have enough content for both? If the answer to those questions is yes, we'll do both. However, while trying to write The Queue it is becoming increasingly obvious that the community at large is pretty burned out on the current game. So we'll see what happens, no decision has been made yet.
"Has the actual size of Azeroth ever been figured out? Officially or unofficially?"
People have tried to calculate the size of Azeroth as it's represented in WoW, but WoW doesn't represent the actual size of Azeroth. The game world is pretty condensed. All of the fluff and extra space in between landmarks has been yanked out. There are no residential areas and things of that sort. As it is represented in WoW, it's been calculated that the world is about 12km across, which is small. Really small.
"Do you think we will ever see a legendary that does not require 25-man raiding?"
If there were ever a time that this would happen, it's Cataclysm. With the Cataclysm raid changes bringing 10 and 25-man raiding even closer together, there's less and less justification for keeping legendaries in only 25-mans. It's possible that they'll keep it 25-man exclusive to reward those raids for the greater logistical effort involved, but that seems very odd if they're trying to remove gear as a consideration when choosing your raid.
"Weren't the press beta invites sent out? Why haven't we heard anything else since then?"
They did not send out press beta invitations. They sent out press beta invitation invitations. The press is being invited to accept the opportunity to get a beta key some time in the future.
Pretty sweet, I know.
Have questions about the World of Warcraft? The WoW.com crew is here with The Queue, our daily Q&A column! Leave your questions in the comments and we'll do our best to answer 'em!