You are right, I wouldn't expect Yamaha to do the calling, but I would think Sena would be all over it in an effort to sell more units.
Actually when I called, they were nice, but still the woman on the phone stated that it's does not work with the Yamaha Venture. She then directed me to post up on the community forum to request the engineers to look into it, which I did. I noticed there were a few other people asking about future compatibility with the Yamaha Venture, so I tagged myself with that group. Think there were some people asking the Can Ams too if memory serves, which I didn't realize also had the wired type unit.
Now that I look at them though, I noticed that the Harley version has a yellow button and the Honda one has a red button.
Maybe the Yamaha version can have a blue button?