Regarding Zach Beane’s query what people are working on in Common Lisp in 2008, here is the stuff I’m currently working on in CL, all of which is in use by industrial customers:
Most of the code is self-written including some internal support libraries, but the code base uses ASDF, CL-PPCRE, CL-YACC, CXML, Puri, SLIME, and trivial-gray-streams. Thanks to everyone who put so much work into those.
Framework for target-based testing of generated code, including test-harness generation, stimulus/result management and differencing. This is also used in the validation of code-generators, same as the Reference Interpreter above.
This tool is implemented using LispWorks on Windows, and employs CL-PPCRE and a modified early version of xmls. Note that the tool has been used in production usage for a couple of years, and is mostly in maintenance mode.
Well, there you have it, looking forward to hearing about other users/uses!