Mudballs was written with the goal of providing an easy to use system for loading1 Common Lisp code into your image in a reliable and predictable manner. If you are new to Common Lisp, think of it as the start of a CL equivalent to Perls CPAN or Ruby's RubyGem's.
Interesting work on Qi, a language based on Common Lisp which incorporates features such as (optional) type checking, pattern matching similar to those in ML and Haskell and logical programming (Prolog).