I went through the european site, registered my avr the first time and if i remember well there was something like communication tab and I mailed them through that. As far I remember I did receive a confirmation on screen that my message was sent and they will respond to me soon...or something like that. Second time again on european site I clicked on customer service tab I typed my data and AVR's serial number and asked again for the beta firmware that solves problems with picture processing on 24 fps content. I think i had again that screen confirmation message.
Well, even if they supposed to send a CD I am expecting to receive an e-mail about that! Let's see.
You should have gotten an email right after sending the online form. Check your spam folder.