I was looking around on the internet and somehow in a search for ARB air lockers I came across this twin turbo setup, the page is not very descriptive, anyone heard of these?
http://www.quicktimeautomotive.com/_wsn/page16.html

they came on this site along time ago.....IIRC. It appears as if they have made no progress in 2 years. I beleive the website was the same then.

It looks like two of the same size turbos to me. The Dodge guys did that long ago and found that one small charger and one big charger works much better.