I've looked into it and love the benefits/security BitAUD holds over any UIA however the difficulty and risk with juggling the MPA as a gateway would cost a large chunk of energy and time which I think could be better used for marketing/education to the general public.
Like said as well it would likely require further regulation/roadblocks from the government as well.
After enough adoption/use of the UIA I'd like to create liquidity between BitAUD and the UIA if possible.
RE: Starting a BitShares Gateway