Arkhandus,
elusive target, in d&d allows for 3 things (its in complete warrior. Its a tactical feat)
1: whoever you dodge, their power attack doesen't work on you but the attacker still takes the power attack penalty.
2: if your being flanked, and one of the flankers is one you selected with dodge, their first attack of every round (thus the first iterative and the most likely to hit) automatically misses you, and instead attacks the other flanker. the dodged flanker doesn't even need reach to the other flanker. basically you deflect their blow into the other opponent's.
3, if you move through a threatened square, and the attack of opertunity misses, you get a trip attempt against your opponent. This does not prevoke, nor may you be counter tripped.
elusive targets other prerequisite feat is mobility, so most of the time the enemy will miss with number 3.
Their is some debate on how number 3 works. The flavor suggests that you go straight to opposed strength checks. Also its not clear if you have improved trip if you get an extra attack because you have made no initial attack.