In any case, I personally wouldn't recommend using Xunleashed on WoW. It would probably be easily detected, but I really can't give you an official answer. TA might be able to help you when he sees this thread.
I am on one comp (main) running my primary toon, while I am in a party with my other toon on another account (and on my second comp). I will type something like "heal me" in party chat in the game. XU, running on second comp, would see this text appear and trigger the "clicking" of the appropriate heal button.
I am not very well acquianted with Xunleashed, are there functions built in that would allow you to easily retrieve information such as text? I was always under the impression that other basic scripting languages could do as well, if not better. Please educate me.
Good luck with your bot.