I know it's a little late - a lot late, in fact - but I've only just managed to watch some matches from the last MLG WoW 3v3 Arena Tournament in Dallas.
Let me tell you, if you like Arenaing, you should watch these.
Not only is there significant hunter action (yes, really. Go watch because you may never see this many in LAN tournaments again!), but these were some of the closest Arena matches I have ever seen.
Since there are so many (I haven't even seen all of them myself yet), I'll recommend some highlights so far:
eMg vs anything
This team, comprised of hunter/enhance shaman/pally or priest (dubbed the "beast cleave" setup due to shaman ghost wolves and hunter pet), eventually won the overall competition.
In their first match (against Fnatic) there is a fairly decent stretch of hunter kiting, although the MVP of this team was definitely the priest/paladin Kintt (yes, the one that used to play for team Pandemic) - his instincts were flawless, particularly in the later matches.
Button Bashers vs anything
This Korean RMP, also known as HoN, is still the most aggressive and dynamic 3v3 team I have ever seen, even though they didn't make it through the round robin heats.
Anyone who follows the Arena scene will probably remember the mage Orangemarmalade; he hasn't dropped his game one bit and both his teammates Numberone (priest) and Hannival (rogue) have their moments too.
Match highlights are winning two 2v2s against a mage/priest (2 different teams) as both a mage/priest and a mage/rogue - not quite as spectacular as the 1v2 Orange pulled off in a previous tournament, but still very impressive.
The finals - eMg vs x6tence
It may not have been that close in the end, but who wouldn't want to watch not one, but two hunters in the finals of an Arena tournament - ZOMG!
They played key roles in winning their matches too, since more than one Freezing Arrow hit its mark - who would have thought it'd be worth the risk to use this spell instead of Frost Trap?