Nashbar still has large stock of the ES's, so it's a good gamble to subscribe, wait and watch for another price reduction. Sometimes the Campy version gets reduced first and it's simple to have the LBS switch out the freehub. Here are the current links:
http://www.nashbar.com/profile.cfm?c...Mavic%20Inc%2E
http://www.nashbar.com/profile.cfm?c...Mavic%20Inc%2E
http://www.nashbar.com/profile.cfm?c...Mavic%20Inc%2E