Alessandro Zummo wrote:

>  they're so cheap that it would be fine to have one connected to a
> pic...

  Cheap?  I find that quite absurd!  The whole marketing concept of
these devices is to sell the main controller for something close to
a realistic mark-up and make hideous profits from marketing trivial but
desirable attachments for ten times manufacturing costs, in addition to
the games software itself.

  You *must* have a secret source of supply.  All such attachments I
have seen are in the tens of dollars range.  Chips contained can't be
worth more than $2 aggregate in bulk.
--
  Cheers,
        Paul B.