As we said on the podcast this weekend, one of the most interesting things to come out of the Hunter Q&A last week was that vague about "long-term plans" to "[remove] the need for hunters to rely on a different resource system then mana." That one kind of came out of nowhere, and the answer was even more vague: basically, they promised to talk about it at BlizzCon. Of course, that's what our attracted our attention: is Blizzard planning on getting Hunters off of their mana system completely?
That would be quite a change -- since the beginning of the game, Hunters have relied on mana as their "resource" -- Warriors have Rage and Rogues have Energy, but Hunters somehow got looped in with the other DPSers as mana users. That doesn't make much sense -- not only does it depend on Intelligence (a stat which Hunters don't really have a reason to go after anyway), but it's lead to the problem of keeping Hunters powered up. Hunters are almost continually out of mana, and Blizzard has made some wacky mechanic tweaks (with both AotV and Replenishment) to try and keep them up and running.