I was doing some arena's last night and had a sudden realization about an addon that would make multi-boxing a little easier. In arena's I use an addon called Proximo (http://www.wowace.com/wiki/Proximo and http://www.wowinterface.com/downloads/info7312.html ) that automatically creates a targetable list of enemies on the other team as you mouse-over them. You can use it to target them, it corrdinates between everyone on the team that has it, allows you to assign macros for when you click the target in the list, etc.

Here is what I can imagine a similar addon being for multi-boxing PvE. It would work like so...

- Select a target and use a macro to add it to the list (maybe even put a raid symbol on it)
- Repeat for each mob in the group
- Have a macro for each character that can CC that targets a certian mob from the list and casts the CC spell

The addon would need to have an exposed api for macros. Something that would let you target a mob in the list based on its location in the list. For example, if I wanted to have a mage always sheep the 2nd one in the list, its macro would be something like:

/cast [target=#addon_target_2#] Polymorph

I wish I had time to work on an addon like this, but my current workload takes up most of my time. Anyone think this is doable?