The latest version of Steel Bank Common Lisp is out. This month’s release fixed a bug and introduced several optimizations. See the NEWS file for details. As usual, the release compiled without incident on my MacBook Pro and the regressions tests all passed.
If you want a really great Common Lisp environment, it’s hard to beat SBCL and Emacs/Slime. Together you have an excellent CL IDE. Even if you’re just getting started or only want to play around, this is an excellent set up.