What's a Good Pace for an Ultramarathon?

"The only good race pace is suicide pace,
and today looks like a good day to die."  
-Steve Prefontaine

We'll see what kind of pace I pull off today at the Howl at the Moon 8-Hour ultramarathon. It's going to be warm and humid, with a chance for rain. Guess that beats 95 degrees and sunny!  I'm sure Pre would have enjoyed the courage and passion of us ultrarunners.  Whether it was in his prime, or today when he would have been 60 years old, Pre would have kicked my ass in any 8 hour running event. But I'd try to make him earn it!