Yeah, we had my mate from work do our wedding photos. He used his and my nikon D70's (one with a 50mm 1.4 and one with the 80-200 2.8 or 18-70mm on)
Reason we wanted him, I guess first I didnt want to spend 2 grand!, but mainly because unless you spend a LOT of money, you are likely to get someone who quite literally is a cheeze ball. ! lol. I mean, the usual cheezy same-ole stuff, a lot of people like that sort of thing but its not for me.