New lisp-dialect for probabilistic models

I'm currently at UAI and there is a really interesting paper which uses the code-as-data aspect of lisp to create a language in which you can describe an arbitrary probabilistic model, and do inference on it.

http://uai2008.cs.helsinki.fi/UAI_camer ... oodman.pdf

Wow. I wish I did more statistics units in uni. That looks like some very powerful code . I'd like to see how it grows (once I know enough stats , I'd like to use it).