Hi everyone,
today i found a really interesting movie on warcraftmovies.com :
Pass Level 49-52 fast By Downup
This tells you how to get up really fast but im not sure if you couldnt do this much earlier than only between 49 and 52.
Have Fun.
Edit:
As we worked out together, it can be done from 35 to 55.
For more informations read the thread.