Recently I started having technical difficulties while running WoW. I'm in Australia, and in addition to the lag problems a lot of other people have mentioned, even with the Oceanic servers, I was also having problems where at times I'd get randomly disconnected from the server.
Like a lot of people, I initially thought the server was to blame. However, I'd previously installed WoW in Linux as part of a different project of mine, (I've been using Linux in some form or another for close to a dozen years now, on and off...although Windows has remained my primary system for most of that time) and had already noticed in passing that my latency seemed a bit lower under Linux. I went back over to it a couple of times recently when a lot of other people were complaining of lag or dropouts from the server...and lo and behold, for me those problems entirely disappeared.
My ping times are consistently under 400 ms, (occasionally under 300 for brief periods) I never experience the types of disconnections I used to under Windows, and the OpenGL rendered graphics are really gorgeous, and moreso in some ways than Direct3D in Windows. On the negative side, the currently experimental voice chat wasn't working when I tried it this morning, but I'm fairly sure that's due to my sound card.
Of particular relevance to Hunters though is the fact that a below-400 ms ping time means I have at least some chance of being able to perform a proper 1:1.5 shot rotation, which is the recommended rotation for Marksmanship or Survival, without anywhere near as many stray shots. The other reason why this is a good thing is because if I'm not having stray autoshots between my specials, it raises my odds of having crit specials dramatically...so I've started seeing scenarios at times at least where I can fire Steady, Arcane, Auto, and get a 1k+ crit on both specials in a row. Pretty awesome stuff.
If you're interested in having a crack at doing this yourself, you can download Ubuntu and then go to the WoWWiki page for more information. If you do a search in Google for "Ubuntu wiki wow", (without the quotes) you'll also find a link to the Ubuntu wiki. You might want to go to that wiki anyway if you're new to Ubuntu in general, and have a read up about it. It does take a little bit of doing, as most things with Linux do, and if you're not technically inclined you might want to leave it...but if you're feeling adventurous, give it a try. :)
For non-American players, the lag reduction is probably going to be the single biggest draw, although some of you might be interested in seeing how things look with the different rendering engine, as well. It's very nice.