Sorry to bring this up again, but I found another shield that is super cheap and looks really good. Plus it will interface with my grove starter kit sensors! The only problem is I can not find a data sheet, so I don't know what the voltage loss is. When I click the links tab it just says "loading…" I was wondering if anybody knows about how much voltage it will lose.
Thanks,
Drew Davis
http://www.seeedstudio.com/depot/motor-shield-p-913.html?cPath=132_134