I thought this was kind of interesting. It looks like DC and GM have taken notice of the Mustang's success.
http://www.cnn.com/2006/AUTOS/funonwheels/01/09/detroit_camaro_concept/index.html
http://money.cnn.com/2006/01/04/Autos/funonwheels/dodge_challenger/index.htm
http://www.cnn.com/2006/AUTOS/funonwheels/01/09/detroit_camaro_concept/index.html
http://money.cnn.com/2006/01/04/Autos/funonwheels/dodge_challenger/index.htm