The Shared State Concurrency (SSC) project aims at producing a specification and a test suite for a shared state concurrency programmer interface to be available in all Common Lisp implementations.
The (work in progress) specification.
Proposed SSC Addendum 1: Busy Waiting. (not ready yet)
Proposed SSC Addendum 2: Read/Write Lock Fairness.
The (work in progress) review of the multithreading API of some CL implementations and of other Lisp dialects.
http://common-lisp.net/project/ssc/darcs/spec contains the TeX files of the SSC Specification. All documents are dedicated to the public domain. Note that this is still an early draft.
http://common-lisp.net/project/ssc/darcs/doc contains additional documentation files, including the review of the current state of the art and the current proposed addenda. All documents are dedicated to the public domain.
http://common-lisp.net/project/ssc/darcs/test contains the test suite. It is licensed under the GNU General Public License (GPL). It is a work in progress.