I just wanted to report that with the latest CVS checkins I believe Movitz basically runs under CMUCL (at least 18e which is the version I've got).
The set of known lisp implementations that works with Movitz is now Allegro, SBCL, and CMUCL.
The only implementation I've tried and not gotten to work is CLisp, which core-dumps some time during the build process.
Note that there is in principle nothing that binds the Movitz development environment to the x86 platform. Even for testing, bochs can be used on most architectures and operating systems.
movitz-announce@common-lisp.net