“RDA is being developed as a new standard for resource description and access designed for the digital world.”

A webinar/presentation about RDA, which the cataloging world has been abuzz about is located here
http://tinyurl.com/yexxlyn

Also, a couple of demos out (just demos, not product):
A small demo example for what “open development” could do:
http://www.biblio.tu-bs.de/db/wtr/content.htm

Very no-frills browsing by rule number, rule title, core elements, and keyword (all words from all rules).
If you want to jump in directly to, say, rule 1.6.3, just say
http://www.biblio.tu-bs.de/db/wtr/page.php?urG=PAR&urS=1.6.3