There is a nice article from the creator of RLisp. I believe it could help us put together some nice OO system for newLISP.
Object-Oriented dialects of Lisp
http://t-a-w.blogspot.com/2007/06/object-oriented-dialects-of-lisp.html
See these languages (OO+Lisp):
RLisp:
http://taw.chaosforge.org/rlisp/
e7:
http://www.e7code.org/
Goo:
http://people.csail.mit.edu/jrb/goo/
JazzScheme:
http://www.jazzscheme.org/
Fanda