The co-publishers of RDA have announced a complementary open-access period starting from the launch date (planned for June). The link:

Quoting from the linked page,

“The contents of the RDA Toolkit will be completely open at no charge for everyone to try from the RDA launch date in June 2010 through August 31, 2010. The open-access period will end on August 31, 2010 regardless of the actual launch date. Specific details on how to register for the free open-access period will be announced closer to the launch date. Sign up[*] to be added to a mailing list to receive announcements and updates about this and many other RDA Toolkit topics.

“After the complimentary open-access period, potential subscribers can sign up for a 30-day free trial account to help them evaluate the RDA Toolkit. Trials for either solo-user or multi-user accounts will be offered. During this 30-day free trial period users will have full and complete access to the RDA Toolkit site.”

*Sign-up link is

(Cross-posted at Flaming Catheads.)