Hey I never saw this reply.  The Buffalo card works with standard Orinoco drivers, but as Bunsen was I think touching on, the lowest-level Orinoco driver I could find (which I think is 6.3) cannot be installed with under 32mb of RAM.  I don't know if it can be run with less than that - it might work with 24mb (which is what I had the time) because that will run 8.6 - which is the minimum requirement for Orinoco 6.3 as far as I can tell.