Some of you might know of this already there was a thread about this on the offical boards...
As most Hunters know,you your Quiver/Ammo puch provides haste to your auto shot.
You can't equip more than one of a quiver or one of an ammo pouch,you can however equip one of each and get the bonus from both.
So if you haev a Quiver and a bow,pick up an ammo pouch and equip that as well.So if you have a Quiver with 10% haste and an ammo Pouch with 10% haste you now have 20% haste to auto shot.
With a Quick Draw Quiver and Ribbleys Bandolier you can effectively have 27% haste to auto shot,this results in a pretty dramatic DPS increase.
Doing this to say a Gorewood bow which has a normal delay of 2.50 ,or a 1.96 Delay with a quick draw quiver will lower your delay to 1.72 with Ribbleys Bandolier.
With a hurricane it drops the delay down to 1.03 seconds ,Toss on Rapid fire and your shots come off in .60 of a second.
For an idea of what kind of boosted DPS this puts out at lvl 60 with this lvl 16 bowhttp://www.thottbot.com/?i=5423 my UI was giving a listed DPS of 99.5 ,thats with a 16 bow,with a gorewood it puts me at over 140 before Aspect of the hawk or anything else is applied.Your exact amoutn wil lvary dependant on gear.Basically amounts to about a 15-25 DPS increase at the cost of a bag slot.With a Fast bow its lethal to casters since the almost non stop hits result in channeling being destroyed.