Are you kidding? What is this:
http://www.google.com/codesearch/p?hl=en#zAePDxanDsk/openamq...
This is the metaprogramming we used to build OpenAMQ. It was very successful in technology terms (1M lines of real code generated from 20k lines of metacode) but a failure in social tems (too high a barrier to community participation).