[edited from support email]
We are using one of your DirectIN keyboard (operating information document is dated Summer 2005). I'm currently using the keyboard on an intel-based MacBook Pro (2.6 GHz intel core 2 duo, OS X 10.4.10).. It seems to work well in tests via MATLAB, but alt/option and command keys are reversed in all applications. This is not a serious problem, but it is a nuisance, and I'm hoping you can offer some advice to remedy the problem.
BTW, I'm very impressed with your product, and hope to order a few when I return to my lab in.... You might consider running some tests from within the PsychToolbox in MATLAB, and posting your results in their forum -- a low-cost, ms-accuracy keyboard would be very attractive to the large number of researchers using that toolbox to collect data.