And if it doesn't, is there anyway to speed up my python code for accessing pytables on a 64-bit system (so no psyco)?
There is some support numpy. Running pypy 1.9 I get the following message on importing numpy:

ImportError: The 'numpy' module of PyPy is in-development and not
  complete. To try it out anyway, you can either import from 'numpypy',
  or just write 'import numpypy' first in your program and then import
  from 'numpy' as usual.
Does Pypy Support PyTables and Numpy?