One theory on the 64 bit thing;

One benefit may be the ability to run multiple apps at the same time .. in RAM.
If they were 64 bit you could probably run RB and BB (or for that matter any two or more 32 bit apps) at the same time with very little issue concerning resources, due to additional RAM. While they run at 32 bit they share the first 4 gig RAM. At least that's my understanding. Correct me if I'm wrong.

So while BB may not see any improvement itself from 64 bit, a given system may (depending on the apps being used simultaneously).
Just one theory.

Peter said it would be coming .. I'm patient. It's not been an issue here yet, due to work flow.

Make your sound your own!
.. I do not work here, but the benefits are still awesome