I've tried it before, but I thought I'd give another go at a BM build. Hoping to learn from my betters, I altered the famous BigRedKitty's spec for use in melee, and rummaged through my bank to look for stuff I could use under conditions where I don't have aggro. My tanking gun was replaced by Hemet's Elekk Gun, my Madness Card with the Maelstrom Card, and my Vengeance Card with a rotation of trinkets: Core of Ar'kelos, Uniting Charm, Terokkar Tablet of Precision, Bladefist's Breadth. My rings and necklace were replaced, too, trading off tank stats like dodge and parry for attack power and agility.
I used my pet wolf Cafall as my tank, giving him Growl 8, Bite 9, Dash 3, and Howl 4.
With Cafall having aggro, that removed Mongoose Bite and Counterattack as options. Finally, I became what people accuse me of: a player that spams nothing but Raptor Strike. (Well, Kill Command worked its way in there, too.) The lack of aggro also meant there was no reason to have on Aspect of the Monkey. It was Viper, all the way. Good thing, too, because without Resourcefulness I was hurting terribly for mana.
Honestly, this whole setup is horrible for what I do. I fell from a dps range of 550-700 down to 275-400. I was drinking every other fight or three. Cafall had problems holding aggro (though that may be due to my inexperience in letting him hold it). And neither of us were nearly as durable as I've gotten used to.
A build that includes Resourcefulness might be an improvement, but even then I'd still be facing the problem of lower overall dps. On the whole, I think I have to consider the case for Beast Mastery builds closed: I just can't seem to find a way to make them work for the way I've learned to play as a melee hunter.