Recolance moved to bukkit help
Moved to WIP and Development Status - please pay attention to where you're posting.
EDIT: Also, on topic, onCommand isn't an Event, so won't use...
Moved to Bukkit Help, but really you should post in the MobArena post, or on the BukkitDev page.
Why are you trying to set wool as armour?
373@16458:1 might be what you want.
Separate names with a comma.