Reader Thomas pointed us to this forum post by Tigole, which contains some fun news for battleground fans, even if it is a little early in the design process to really expect anything yet. Tiggy basically says that while Arenas have gained some station in the world of PvP, the focus will eventually shift back to battlegrounds -- Blizzard would like to make BG content that "could be of higher quality with a higher degree of accessibility." They're still working on that competitive BG idea, and they want the focus to go back to the solid Horde vs. Alliance idea that's at the foundation of Warcraft.
Additionally, they're planning to let us queue up for the BGs from anywhere in the world (which, no doubt, would increase participation from both factions), and Tigole also suggests that eventually they may offer XP through battlegrounds, giving players yet another way to level up (twinks may not like that suggestion, but these changes are a long way off anyway).
This last change there -- offering players a way to level up with PvP -- is seen by many forumgoers as a direct stab at Warhammer Online. That game makes a big deal out of offering battleground-style PvP, and letting players choose it as a way to completely avoid PvE and earn XP and levels. So it may be that Blizzard saw their launch, and plans to turn back in that direction to compete. Which isn't a bad thing for us anyway -- as good as WoW is, some slightly-more-serious competition will only make it better. Being as I'm a BG fan, Tigole's hints that BGs are coming back is music to my ears.