So far, I have seen very little feedback on my OS X helper. Oh, well. Works for me
It seems that Windows then Linux helpers are in demand. The Linux one should not be very difficult to write; Windows on the other hand, I have to be a bit creative.
Here are the limitations I am foreseeing in the Windows version:
1) Only recent version of Windows (== likely no XP support)
2) Portable. Well, not really because on Windows you still have to install the USB drivers provided by your manufacturer if you haven't already done so. What a mess.