The idea of communicating with Yamaha has come up before, and it's pretty unrealistic. You can read more as to the reasons why in the thread about the Japanese culture clash . Even the US reps for Yamaha privately complain about the one-way communication that exists in Yamaha from the corporate office to it's employees, and the previous posts here about trying to get feature/bug fixes confirms much of that.

If you really want to leap ahead past the Tyros 2 I think that time and money could be better spent by looking into the products of smaller companies like Ketron (their MidJay is a good model of where arrangers could be going in the future), the latest models of the Neko from Open Labs for those who want to go into softsynths, and even the ideas that we've come up with for using laptops live in our FLR threads . We've definitely got to look beyond Yamaha for the future of arrangers.