Oh, it's not forgotten. It just didn't progress a whole lot.
There's a chain of things planned outside MakeHuman where the MHAPI project will be needed as step number three (it involves a grant application for psychology research on emotions using 3d-generated faces). Initially I thought we'd be going ahead with this in december, but (as is the case more often than not in the university world) things progressed a lot more slower than anticipated. MHAPI is still in the plans, but as it no longer was such an emergency to have it in place, I prioritized other things.
Anyway, the status is still that the namespace and the basic set of function names need to be finished for the API, something which should be done before starting to implement any actual functionality.
So I'll be very open towards merging pull requests regarding such specifications if they are posted at
https://bitbucket.org/joepal1976/makehu ... t/overview