I keep seeing people say they're planning on doing this. It's dumb. I highly, highly doubt the game will be designed in a way that makes it easy, or even a good idea, to play on the Dreamcast controller.
You're going to be sorely disappointed, I bet.
I want the save file from the old VMU to be transferable too. I also want 18+ hentai of female characters on the VMU, because owning one is already poof that we're all around 30 years old.