If I was young again, and an ultra-cyclist, I'd want to do RAAM on a Rivendell.
Maybe RBW would sponsor me with a special frame called the "RAAMbouillet" or something, just so their frame could carve its way through the sea of carbon fiber. High bars, longboard fenders, for the wet weather. I'd keep it light.
My crew would be well stocked and they would have orders to hand out complimentary neck braces, along the way, to all the cats with low-handlebarred, carbon fiber frames.
Just being silly. But I would really love to see someone on an RBW bike in RAAM. That would be great. I bet RAAM hasn't seen lugged steel for 20 years.