It’s the beginning of the month so there’s a new version of Steel Bank Common Lisp available at the usual place. The nicest improvement, I think, is that you can now restart frames in the debugger. As usual, there are bug fixes and a few enhancements. See the NEWS file for details.
Also as usual, I want to recommend SBCL to anyone who is or wants to be Lisp programmer. It’s an excellent system that includes a optimizing compiler. Combine it with Emacs/Slime and you have a world-class Lisp environment.