I am interested in fooling around with this software with some test accounts. I have 30" monitors and I intend to split them up such that I can have 2 copies of WoW running on each half of the screen with no seam down the middle. Right now I am using WoW Maximizer to do that - it does not work just yet but I know why and am working on it. Soon, it will - in effect removing the windows around WoW and basically using a dual core computer and an nVidia 8 series GPU to run two WoWs at once (at nearly 60fps each!) when previously it would have needed two separate computers to do so.

While I have always been a staunch hardware only guy, this may make sense to augment some of my hardware with in order to greatly simplify the amount of keyboards and mice I have to deal with as I segue into 10 accounts at once. I see this as being a quasi KVM combined with Synergy if I can get it to work as I think it can. It will make a handful of computers a large "cluster" of machines - enabling gaming at 25+ megapixels (even though there are multiple clients running and it is not all one HUGE game).

Not having read through all of the replies or tested it myself yet, my questions to you guys/girls:

Can you broadcast several dozen different keys or just a handful? I would need to broadcast a ton.
Can you hot key broadcasting to certain boxes only? Meaning hit say Alt+F1 and send commands to only boxes 1,2,3,4 and not 5? Or 1 only and not 2,3,4,5?
Can you setup multiple hot keys to broadcast to say, 1,2,3,4,5 or 6.7.8.9.10 or all 1,2,3,4,5,6,7,8,9,10? Or more?
How well does mouse duplication work? Does it sync up perfectly (Even hardware mice don't do that).
How stable is it?
How exactly does it differ from AutoHotKey?
Is this being hosted somewhere? The link seems broken and the sourcecode out dated? Can anybody (Ellay?, Sourceforge?) step up and host it?