ASUS confirmed that the cards will probably not make the February shipping date. Although the reasons were not revealed, we believe it could be a mixture of expected lack of game support and the corporate reshuffle and restructuring that ASUS is currently going through.More info over here.
ASUS Delays AGEIA PhysX Expansion Card

Reader’s rejoicing over the really soon launch of AGEIA’s PhysX PPU expansion card by ASUS might be disappointed..