I have a 3 phase panel in my shop, using it on single phase power. Just one I had lying around when I built the shop. I only have about 5 circuits in it, so I just hooked up the a and c phases. It looks like a 3 phase high leg panel, with a blank plate in every third space. That being said I would not put a 3 phase panel in a house, just not enough breaker spaces, or if you pick up 2 phases on on leg you could be way unbalanced, not really a good idea.
