Was anyone able to obtain a Darkmoon Card Hurricane and test its proc on Enhancement before beta closed? The only information I could find using the search function here is a post from early October from a warrior stating some "prelim testing" that apparently showed it having no ICD. Some more solid background on it would be helpful if anyone knows anything (mastery effecting it, etc).
Here's a screenshot from live showing a much higher damage range than the base 3750 to 6250, damage values multiplied by the amount of benefit I gain from mastery. Unless the tooltip is incorrect, it's probably safe to say that mastery does affect the proc. I have personally tested and seen that nearly every other readily available elemental damage proc receives benefit - Icebreaker, Fiery Weapon and Darkmoon Card: Maelstrom.
I have no solid information on the proc behavior, but what little I've been able to find suggests that it follows basic PPM rules, with a one proc per minute rate and no internal cooldown.
Locking this thread. All future enhancement shaman discussion should take place in the new Cataclysm discussion thread. With the launching of the new threads, rules will be aggressively enforced as per this announcement: