Lore would be my top interest. Although things like major system changes are always good to.
Why do you prefer the format you voted on?
Text can be read at my own pace and is a lot easier to reference at a later date.
What sites or podcasts are your primary sources of WoW news?
MMO-champion and WoW Insider are my primary sources, although I also look at Wowhead on occasion.
What sites or podcasts have conducted the most compelling interviews in the past?
I'd probably say WoW Insider, although that's a minor preference.
In a single interview do you most prefer one-on-one, multiple people asking questions, or multiple developers answering questions?
Depends on the subject at hand. If the QA has a very narrow focus, then a single developer answering the questions is fine. If it's a general QA session however, then multiple developers are probably better. No strong preference either way on the number of people asking the questions.