I've heard that there is more enthusiasm for RDA outside the U.S., in Europe and in the international cataloging community in general. That's my impression from reading this post: RDA in Europe: or the implementation domino effect.
The blog's author, Céline, has also written an earlier, related post: Recommended Daily Allowance: RDA.
Both posts provide a nice summary of RDA in Europe: making it happen! an EURIG-JSC seminar on RDA held on August 8, 2010 in Denmark.