GM Performance Parts is debuting their LS9 crate motor at SEMA 2008. Jalopnik points out the current Z06 engine costs $14K so one can expect to pay more, possible a lot more for this motor. The great thing about this being offered as a crate engine is you no longer have to wait for a ZR1 to crash near your garage to have one. The only thing you need now is some deep pockets.
Update: A member on Pro-Touring.com posted the price at $28K