hey bd, we have yet to ride, but still, here's some stuff I've seen.
Before: Cannondale Wind Hubs / CXP-22 Rims and DT Stainless Spokes
Now: 2005 Bontrager Race

Noticeable Differences:
looks cooler
hubs turn more smoothly and go on forever if they're spun in the air

Not sure about:
weight, might be lighter since I don't own a scale.
more areo, maybe - bladed low spoke count.
am I faster? not sure.