Would someone please fill me in on direction for loader code?

[Jefferson Carpenter]

When I write patches touching the loader code (including process and 
thread initialization and startup), it would be useful to know the 
overall plans for that area.  Generally I'm asking about ntdll.

What is the team's overall direction for that area of code?  Is it as 
simple as "it just has to work"?  Are there things about how it works 
that aren't expressed in code but have to be preserved?  Or do you have 
plans for how you're intending to change it in the future?

Thanks,
Jefferson