Over the last few days trying I've tried out a few BM talent builds. I believe I have found one of the best Anti-Melee Hunter builds available at 70.
I have been able to easily beat all types of Rogues, Warriors and yes, even some Ret Paladins.
The talent build is 53/7/0 (the specific build can be found on the BM PvP page).
The key pet in this build is the Chamaera pet. Its special, Froststorm Breath, decreases movement speed by 50% for 5 seconds every 7 seconds (with Longevity).
Combine Froststorm Breath with concussive shot (4 second daze) and your target can always be slowed from range.
It is also a Cunning pet, which has Wolverine Bite available. Wolverine Bite comes into play after the target dodges, which will usually happen against a melee target, and it hits hard, crazy hard!
This was on a Rogue in Warsong Gulch, my buffs that created this monstrous Wolverine Bite crit are just Aspect of the Monkey, 200 AP Trinket, Bestial Wrath & Kill Command.
Another key point of this build is having the Glyph of Frost Trap (increases radius by 2 yards) and the Glyph of Aspect of the Monkey (after dodging while in Aspect of the Monkey your movement speed is increased by 30% for 6 secs). This allows me to kite melee classes around my larger frost trap while most of the time running at 30% faster speed.
Bestial Wrath / Beast Within & Intimidation are some other essential tools available with this build (but I'm guessing your very familiar with them).
Disengage & Deterrence are some other major tools available that can be of excellent help in defeating melee opponents.
With all these tools in this build Hunter's can defeat and even dominate melee classes... now caster classes, that's a different story...
I also have posted a Hunter Glyph Guide for PvP.