the C5.0 Prodigy.
I ordered them about 2 months ago. waited in line, paid, then was told that the rims he received from the mold weren't up to his standards, and he wanted to do better for me.
then i was told that they'd be in by the end of March.
then i was told it'd be a little longer. that was 7 days ago and i haven't heard anything yet.

that said, i'm very happy with the S2.0s i have. they look pretty similar to the Nashbar rear wheel i use on the trainer, but the weight difference is STAGGERING.