“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

Also, a couple of demos out (just demos, not product):
A small demo example for what “open development” could do:

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