US Airways Dividend Miles (Pre-FlightFund Merger) - Awards using partner miles

I am planning to book a business class award ticket to Europe on US. Could anybody tell me which booking class/code US uses (C, D, NC, ND, A ?) ?
I would also be glad to hear any experiences in availability of such business class seats to Europe in the coming months.
Thanks.

According to USAIR, business class awards need to be done via phone. Usually 80,000 ff miles (E class) is required, but if your destination is served by their partners, AA, Sabena or SwissAir, the class may be different. E.g. If you want to fly to an AA European destination on a USAIR ff award, the mileage requirement is 90,000. Availability of seats of course depends on your flexibility and season you want to go.
Good Luck.