I'm using SBCL currently, although I have installations of OpenMCL and CMUCL as well, which I switch to periodically.
I'm pretty newbie, although I like to think I learn quickly, but don't be surprised if I ask some odd questions here and there, and occasionally misunderstand something.
My development environment is Emacs running Slime on top of SBCL, all under MacOS X 10.3 (Panther) Server. I also use Araneida behind mod_proxy for one of the applications I'm writing as part of my day job. person