Well we've seen new armor, we've seen new mounts, and now we even see new animations from BC. Pallysucks
points us to this forum thread
in which Aireon from Arthas shows us a bunch of leaked animation graphics that look pretty sweet if you ask me. I've mirrored the files here for everyone to check out.
And perhaps the best thing about this leak is that this probably means there's lots more new graphics in store for all the different buffs and heals. I wouldn't even have though Blizzard was going to revamp the current game this intensively, but it looks like they weren't kidding around when they numbered the expansion WoW 2.0. Can't wait to see it in action.