The kids at GermanCarScene may have caught the RS6 at rest the other day, sans much in the way of fascia obscura, but Ed over at the line not on the outside hipped us to some video they've got of Audi's faster-than-S whip. With an expectation of over 500 and maybe even as high as 600 hp, it sounds exactly what you'd think it'd sound like.
2008 Audi RS 6 Caught Track Testing [Inside Line]
Related:
Spy Photos: Audi RS6, Plus Interior [internal]
Follow video killed the photo spy star on Jalopnik 