Hey there, this is something i've found while i was browsing around WCM.
2nd part of the trick which allows you to run while casting, but this time for all races/spells (xcept channeled spells and hearthstone)
Take a look: Running While Casting 2 (Every Race) By brbwithflag - World of Warcraft Movies
I take no credit for this! Just wanted to share it with you guys before it gets nerfed.
Haven't tested it myself 'cause realms are still down here so..
Edit: Okay so a few servers are back up, and I've been able to test it and it does indeed work (30 ms here)