It seems to have been overlooked just about everywhere and unless I'm seeing things I seem to have stumbled upon a simple item that, so far, I have not seen any comments on in these forums about it.
[Iron Boot Flask]. This little guy has a brutal cooldown of one hour, but it lasts for 10 min as long as you don't mount up in the middle or die. Which rounds out to a little less than 17% uptime, however much of it you can utilize.
The reason I mention it is because it has a chance on hit to do nature damage 100-150 and I believe it can crit. The actual effect is called Electric Discharge. I've noticed that Recount does not pick it up, however SWStats does. SWStats calls it Shocking Discharge if I remember correctly. Although the damage is somewhat negligible, when you are trying to eek out every .01% more DPS anywhere you can get it, this is a small opportunity to almost set it and forget it.
I first noticed it back when I was raiding Naxx, we were on farm at this point, so for some fun I blew all my cooldowns on the first pull in the spiderwing, Glyphed FoK with an Adrenaline Rush while chain pulling, I took a gander at my damage meter and that Electric Discharge was accounting for 2.6% of my damage. Ever since then I bring it always and use it whenever I can. Besides, it's kind of fun running around as an iron dwarf; I think there is also an achievement oriented with it too.
Now I have not done any testing on this in several months and there were rumors that it was being changed in 3.0.8. It may do nothing at all anymore and I'm not very good at theorycraft testing. Maybe this could be some food for thought for someone.