On June 19-20, there was a Ragnar Relay held in Utah. It came at just the right time for me to look first-hand into what I might be getting myself into.
Certainly looks like fun.
The bloggers here, Matt and Audrey, participated in the Ragnar Relay.
Here's their recaps split into three parts: first, second and third.
There are several common themes that I've seen here and elsewhere: the relay is tough, robs you sleep and comfort, but it is so much fun that people are quick to look forward to the next race. I'm guessing that's how we'd be.