What's left to do for a stable D2?

[dsimcha]

== Quote from Walter Bright (newshound1 at digitalmars.com)'s article
> Eldar Insafutdinov wrote:
> > D2 seems to be close to be declared stable. I would also like to know
> > if 64 bit support is going to be the next thing on the list? In my
> > opinion it is much more important than any feature (AST macros,
> > annotations etc). MS is pushing Windows 7 in 64 bit version. It is
> > the same case with Apple operation systems and Linux. Many people
> > refuse to use D2 and fall back to ldc just for this reason.
> I'm very aware of the importance of 64 bits, and it's next after D2 is
> complete.

Just out of curiosity, how hard is 64-bit to implement given that you already have
a 32-bit compiler?