A friend of mine did a similar thing and thought it would be really special if I could have my mom perform my wedding. Thankfully - although hesitantly at first - she agreed. She got ordained through this http://www.theamm.org/ - BTW there are tons of these type of sites but I thought this one seemed the best. Mom called them and they explained what she needed to do - it was easier than I thought. I'm pretty excited about it.
My FHB is Baptist but I'm not and we didn't want to do the courthouse or church thing. Thankfully he also thought this was a good idea.