Implementation updates galore
ABCL 1.0.0 is now available. There aren't a ton of major changes from 0.27.0, but there is a psychological change. ABCL is ready to use and you should try it out.
CMUCL 20c is now available. It's been about a year since the last release.
SBCL 1.0.53 is now available. SBCL releases every month so you might not find this too exciting. However, if you find 63-bit fixnums exciting, you might 1.0.53 exciting, because it can provide them to you.