This WoW hack operates on DLL injection. To load WoW, run loadSpeedster.exe.
Once you are in the game, press 1-9 for different levels of speed, and 0 to return to normal. Press these on your NUMBER PAD, not the numbers on the top row of your keyboard. If it doesn't work, try to toggle Num Lock.
As far as I know, this is currently undetected by Warden. As with any hack, if you get seen by someone and reported you risk being banned, so use this at YOUR DISCRETION.
Virus scans for the .EXE and .DLL:
Also available for download at: http://www.megaupload.com/?d=I4DAX2K4
Note that the EXE is reported as "Heuristic.BehavesLike.Win32.CodeInjection.L".. all real wow hacks involve injection, so this isn't really a virus, but again if you don't want to take the risk, don't!