Alexandre Paes submitted a patch for my CL-Growl library so it now works with CCL (aka. Clozure, formerly OpenMCL), too.
Here is the source tarball: cl-growl_1.1.2010.04.29.tar.gz and the corresponding GPG signature: cl-growl_1.1.2010.04.29.tar.gz.asc. For other ways to access this code, see the CL-Growl page.
Thank you, Alex!