Just a correction on windfury procing. I believe windfury procing windfury was possible in BETA. But in Vanilla, it was slightly different.
Windfury reset the swing timer on your next auto attack to something like .1 seconds, allowing you to proc another windfury almost instantly. The important distinction here though, is you had a 1/5 shot to proc it, not 2/5.
Good times though when it did happen, 2-3 windfuries with a crit or two could easily 1 shot clothies.