Yes there are 3 items i know of that increase your running speed. All of them are boots.
First boots are called Striding boots, and if you hate thieves enough, too bad, because these boots are only equipable by thieves and rangers... increases run speed by 12% maybe?
Second pair of boots are part of some ninja AF, i dont remember the name, but they increased run speed by 12% durring night time hours.
Third pair of boots are called desert boots. I'm not sure which races can use them, but they allow you to run 12% faster during sand storms.
You can bet all of these boots will sell at your AH for over 200K, if you can even get them there.
Of course... you could just play a thief^^
Flee only lasts 30 seconds, every 5 minutes anyway...