From Ray Denenberg's post to the SRU Listserv yesterday:

"The new SRU web site is now up: http://www.loc.gov/sru/

It is completely reorganized and reflects the version 1.2 specifications.
(It also includes version 1.1 specifications, but is oriented to version
1.2.)

...

There is an official 1.1 archive under the new site,
http://www.loc.gov/sru/sru1-1archive/. And note also, that the new spec incorporates both version 1.1 and 1.2 (anything specific to version 1.1 is annotated as such)."