I think one of the biggest benefits a race gets from having their course certified is the general feeling among runners, even those that don't "race," that the event is serious and important. If the race director made an effort to have the course certified he probably made an effort to get everything else right too.
With that in mind, I'm wondering if there are serious and important races out there that have chosen, for whatever reason, not to have their courses certified.
I realize this is kind of a "negative" thread, but in this case I think it's OK. If these races exist I doubt people are aware of the fact that they aren't certified, and people should be aware of that.
Off the top of my head I can't think of any obvious examples in Michigan. Maybe Scott can help?