Solo hunters have already MTed a couple heroics with their pets... http://bigredrhino.wordpress.com/200...eep-heroic-mt/

Multi-hunters have some nice advantages in that you can lose a pet and just allow others to pick up tanking. Reviving the pet is a 4sec unlimited battle rez... I haven't attempted one yet, but I am optimistic that at least a few will be possible with slightly better gear.

I do worry that I might have made a mistake in using Druid as my healer, since I think the best buff for heroics is going to be Fortitude, since you get 161% of its benefit on your pets' health. Pets are super easy to heal and their mitigation is pretty decent, but their health pool is a bit small.