Stoopid Question?

[NetEng]

I watched a little video on Layer3 switching from Cisco and I guess I never thought about this before, but you can have different subnets on each switch port (layer3 of course)?  I also have a network design and I would really appreciate comments on it. Anyone with Visio and an extra 10 minutes, please let me know and review and make sure I'm on the right track. Thanks.