Wow. Finally! I had a very similar runaround trying to get a Sony miniDV deck and/or a HVR-V1U cam HD footage into FCP7 in Snow Leopard. The trick that worked for me? Open up Quicktime Player (10.0) and select ‘New Movie Recording’. Hopefully you can see the footage in QT. I just had to capture a few seconds. Once that happened…opened up FCP and all was good. HD Firewire settings – joyous.
-jeff