Thank you so much for posting all of your findings. This should probably become a "Logic users support page"!
If you could, copy all your posts that have relevant information and post them in the first post. Maybe even get an admin to change the topic title to some thing like "Arduino/USB Boy + Logic support". This could be very helpful to many!
If you don't mind I would edit your first post to something like this:
"The USB-Boy simply does not work with Apple Logic. Thursday Customs is working on a solution but there is none in the immediate future.
Your best bet is to use any kind of Arduino Boy with a MIDI/USB adapter cable/interface.
And then copy all your posts with technical information. I'm not trying to hijack your thread here I just think a lot of people could benefit from this if it were labeled and organized.
Thanks again!
-justin