Nashbar has 36-hold Open Pros with Ultegra hubs for $220. There's a 10% coupon floating around somewhere, or you can get 20% off if you buy 5 items from them. Shipping for the wheels is $16, or $20 for 2-day FedEx.
http://www.nashbar.com/profile.cfm?c...eid=&pagename=
Can't vouch for who builds them or how well they're built.