I have a Cervélo S2 and absolutely love my bike. It has been rock solid. Unfortunately, I had a bad case of chain suck when my chain fell off my chain ring right when I was grinding up a hill. The damage left a little hole with exposed fibers right inside of my chain rings. I doubt Cervélo would warranty it, though that would be awesome.
What about repairs? Has there been any new advancements with carbon fiber repairs? I had similar damage on a mountain bike and just put an epoxy over the hole to keep moisture out. The repair held and I have ridden my MTB without problems since.
Also, I have to repair a pair of Sidi's too.