It's just that I've had a few distractions this semester. The biggest is that I have new grandson! To help the kids, I'm dividing my time between teaching in Charleston and going to NYC every other long weekend. That doesn't leave much time for parentheses...
But... I have one student learning about compilers by creating FORMAT. And another student is building the SORT function, based on the Java sort method. I do get a couple of airline hours to work on the current (ick) compiler. Not much, but it's still fun.
Great stuff going over at Planet Lisp. Thanks to all of those posters!