I've started working on a sample combining BEPU physics with the visuals of Sunburn. Almost everything is working so far, the code will need some minor cleanups before I'll release it. The purpose of this sample is demonstrating one of the possible techniques you can use to combine the physics with the visuals. The source is not yet available. I hope to have it ready & uploaded before the end of the weekend.
For now here are some images & a video :)
The video is using the default Sunburn sample LightRig.