Yes indeedy. And as already mentioned in that thread, I liked the name enough to keep it. I figured that since Arc/Nu is a compiler for the Arc language, rather than a full blown Objective-C/whatever Lisp, the confusion should be fairly minimal...
Incidentally, my new language that I've been steadily working on is called "Nulan" which is short for "Nu language" :P
* : It's worked for a while now but I still need to get the parser into a good state... turns out, syntax is hard!