Evga has them on their site for preorder.

http://www.evga.com/articles/00528/

$499 for the GTX480
$529 for the GTX480 SC
$649 for the GTX480 FTX (Watercooled)
$349 for the GTX470
$369 for the GTX470 SC
$499 for the GTX470 FTW (Watercooled)