SBCL 0.7.13 is out. Dan Barlow says they've made it faster, fixed a lot of bugs, and added some nice extras, including a contrib system (with one contrib being a new interactive top-level similar to ACL's).

At the same time, there's a new port of CLX to SBCL, which even handles tunneling X connections over ssh.

Right now it looks like SBCL and OpenMCL (version 0.14 of which is currently in alpha) are neck and neck in the race to be the next lisp (after SCL) offering native threading under unix. And CMUCL 18e should be out any day now...