Steven Spees Website has a lot of good genealogy information on the (Alsace originating) Spees line:
http://www.vvm.com/~ssltcom
http://www.vvm.com/~ssltcom/jlcooper.html
http://www.vvm.com/~ssltcom/Kentckm.html
 

Here is a link to a very nice slideshow in which people are wearing 18th century Hessian military costumes, as well as modern German military uniforms.
http://home.cogeco.ca/~hessian/08.html