Voted.
IMO:
I see that there are more requests for Market Engine, API and Exchange documentation, but I think that these very topics should first wait for the upcoming changes that would make a today-documentation old.
As a matter of fact, in BM's proposals there are some changes about:
-the market engine (iirc the margin trading mechanics are going to change, following poloniex's style)
-the api will be refactored and made more user/bot/exchange friendly
-some exchange related details will change too, like fees on order's creation/cancellation and percentage fees on order fulfillment that would also qualify for the referral program