It'll go on sale from December 18, 2008. If it sells anything like their other sticks, it'll be out of stock a few days after that. As is normal, it's not going to be available from anywhere but Hori's online shop, so preorder yours now.
The details are listed on the site:
Joystick: Sanwa JLF-TP-8YT
Buttons: Sanwa OBSF-30