GeForce 9800GX2 is due later this month and we can expect cards from a bunch of NVIDIA partners. All reference design of course as making your own 9800GX2 would be way too costly and just a big waste of money since this is a relatively short-lived and expensive card. Hexus has posted more than a few pictures of some of the GeForce 9800GX2 cards on display at CeBIT, none of them were in action though.
Albatron who early announced that it would be showing GeForce 9800 cards at CeBIT has kept its promise and presented a reference card. Meaning 600MHz core, 1500MHz shader and 2000MHz memory clock.