Regulatory evolution

Sean B. Carroll is the key biologist in this topic. He even has his own website: http://www.seanbcarroll.com/

This may he published a "paper" here: http://web.ebscohost.com.ezproxy.hsclib.sunysb.edu/ehost/detail?vid=2&hid=8&sid=4f39dc57-3dba-46a0-8f96-cc1a7a5b842f%40SRCSM2
which is really a great thesis on this topic.