Complete details on Robert Goldman’s page. Here is an introduction to the first talk (by John Maraist):

NST: A Unit Test Framework for Common Lisp

In this talk we will introduce the Lisp unit test framework NST. SIFT developed NST for internal use on a number of ongoing Lisp projects, and we believe that the system is now mature enough to release more broadly. In this talk we will review the notion of a unit test, and introduce the use of NST in Lisp project development. NST’s implementation makes interesting use of a number of Lisp features—macro expansion, compile-time execution, metaobject protocols—and we will discuss its current implementation as well as the lessons we learned along the way.

There is also mailing list, and more information about the Common Roots Cafe.