Looks like VMWare was listening. They've announced much reduced WAN traffic throughput used by their View product with the PCoIP protocol. It's been a few revs since I've worked with their product, but is PCoIP the only protocol option, or is their still another developed by VMWare? That other protocol was pretty sloppy network-wise in versions 3.5 and 4. Just because the pipe throughput is there, that doesn't mean the desktop can consume the entire capacity. Still, glad to see they are staying in the game.
Official press announcement: http://goo.gl/5nGs9