'New' mod chip for 'new' xbox? I think you could be waiting a while for that dude. Look how long it took the fuckers at Matrix to bring that out, and thats only the time we KNEW they were making a chip, it was probably in development ages before they told us.
The new xbox is another challenge for developers so you could be looking at a long wait. My advie would be to survey the Matrix/Xodus situation for a few weeks and if people say its cool go with it, its easy to install and theres no soldering. It depends how impatient you are really.
Good luck.