@Mr. Kemp - what a fine idea! I'll add that to the list with any other great ideas that come in. I think that Kemp has a virtualized version of the load balancers, hopefully they will have a Hyper-V version soon. This way I can show both Windows NLB and a "hardware" NLB solution!
@Paul - The ClientAccessArray is associated with an AD site, not with an IP subnet. If you have "LAN-speed" connectivity between the two locations, you could designate them as a single AD site and have a single ClientAccessArray. We'll be having a lot of discussions around this and other design points through this blog series, so keep reading!
Thanks for all comments - don't hesitate to check out the list I have already planned and leave ideas there as well!