Well, while we're on it, why not post another thing while it still works...
There is a quest in Deradune called "Unstable Accelerite" - this char sized chunk of red glowing crystal / stone.
Once you click it you receive a 25s Accelerate buff that makes you sprint at 1000% normal speed usable in anywhere not just Deradune, which is just ridiculous .
If you don't turn in the quest you can have fun with it over and over and OVER again!!!
Only downside is you have to get lucky enough to join a BG in progress... but once you do...
Enjoy!