I'll fight with ya, if we can get a ref. My AIM name is darthphoenix2000. I'm usually available from 9-11 AM, and again from 4-5 PM central time on weekdays. On weekends it is really very flexible (when I can manage to shove my sister off the net).
To Battle in AIM, first you have to specify whether to use items, TMs/HMs, and super rares. You privately tell the ref your pokemon ya wanna use. The ref sends out your pokemon, tells whose speed is higher (whoever's speed is higher attacks first) and then you say what attack to use. The ref figures the damage (on dice or whatever, so it's fair). The ref then tells whoever that it's their turn. Then they attack, the ref counts the damage, and then it switches around. It might sound kinda complicated, but it's really simple once you do it.