WoW:Sky (AddOn)

--[[
--	registerHostess( {skyHostess} [, {skyHostess}] )
--		Registers a hostess who gets informed as channels are made available,
--		removed, or when players are joined/added. 
--
--	args:
--		skyHostess - table
--			{
--				id - unique id for the hostess
--				callback - function called when a channel even occurs
--					(action, actionData)
--					action - string containing 
--						SKY_PLAYER_JOIN|SKY_PLAYER_LEAVE|SKY_CHANNEL_LIST|SKY_CHANNEL_JOIN|SKY_CHANNEL_LEFT
--                                             NOTE: SkyLight seems to implement SKY_CHANNEL_LEAVE instead of SKY_CHANNEL LEFT,
--                                                   even though its comments don't reflect this. I don't know about regular Sky.
--					actionData - table
--						{
--							channel - channel name (SKY_CHANNEL or whatever)
--							
--						(action dependent:)
--							username - string - username of the player who joined/left
--							list - table - users in channel
--						}
--					
--				channels - table containing channels
--					SKY_CHANNEL, SKY_PARTY, "general", etc
--				description - short string describing the addon
--			}
--]]