Check out this great article from About.com, written by a dad who was not as excited as her wife was about their hiring a doula…and did a 180 degree turn from that opinion after the birth.
http://pregnancy.about.com/od/doula1/a/dads-and-doulas.htm
Although I won’t let a couple hire me unless BOTH of them agree and want me there, often even if the guy was a bit skeptical, he’s got even bigger “thank you’s” than the mother does after the birth of their child!