Posting to RDA-L
The big boys have said they will implement RDA, but it still has never been road-tested. Certain parts will definitely create some controversy when news reaches the public, such as eliminating the rule of three for the rule of one. That is a very serious change and when I have mentioned this to researchers, no one has liked it. At least, I hope it generates some controversy among the public because then it would show that people value our records. But maybe nobody will care. I have tried to demonstrate some other problems with implementing RDA, which should generate some controversy among the public, if they ever learn of them. It seems that searching will definitely change for the public: it will either become more complex or the results will become more puzzling.
I still think that the best advice for catalogers is found in a Far Side cartoon http://scientificcuriosity.blogspot.com/2006/12/why-we-should-always-question.html. Click on the cartoon.