This or something similar will probably be the highest trash dps spec:  http://www.wowhead.com/?talent=fGx0oexoVrobZ0xqbxi0oru

Glyphed with:  Vigor, Blade Flurry, and Adrenaline Rush.

Basically try to obtain the energy restoring talents so you can spam Fan of Knives all night long.   Assuming nothing's changed, but they probably will.   Can top trash meters already without spec'ing for it and this would only push it up way higher.    I personally expect some sort of nerf like Hunter Volley did.

But who cares about trash dps right?    This is more for when Dual Specs appear (possibly 3.1) and you don't got a pvp spec you wanna do for the 2nd spec.    So why not, just spec for trash to make the clear go faster.

Here's some trash tips, and it pretty much applies to current Mutilate and Combat specs as well:

• 2 slow weapons to hit the hardest
• 2 1.8 speed daggers best atm due to 150% weapon bonus to them.  So they'd hit like 2.7 speed weapons
• Fan of Knives is only really efficient to use if there are 3 or more mobs to hit
• Dual Instant (or Wound) poison for your weapons
• Don't be overly concerned with regular dps like SnD, SS, Mutilate, etc, especially in large groups.   Though you probably want to keep HfB up if you have that.