Fark linked up news that a church famous for its helio-centric beliefs is offering $1,000 to anyone who can prove them wrong. Of course, proving the Earth does in fact revolve around the Sun to people who believe the opposite due to sheer bloody-mindedness faith is probably more challenging than it would at first appear.
Then again, I need a new receiver for my stereo rig. Time to put in an application!
If the fact that NASA has sent probes to Venus using heliocentric orbital calculations rather than geocentric ones isn't proof enough, then there is no way, by their own internal logic, to prove otherwise. Or even to prove anything, for that matter.