Sorry to be a pill.... but I found this in about 2 minutes of looking...
http://www.motu.com/download/download_m ... duct_id=21
Seriously, MOTU used to be a total pain in the rear requiring a stupid sign in just to get to driver downloads. They have recently been trying pretty hard to overcome their bad rep... at least with the theatre sound community at large anyway.
Now I don't know if their email support has improved all that much or not, because it's been a while since I've tried to contact them. But the methods are shown here:
http://www.motu.com/other/feedback
Hope that helps some, minus the sarcasim.