VR-Zone has some information on the ASUS Xonar D2X, the soundcard announced at CeBIT.  It is a PCIe card, that can handle 192K/24-bit with 118dB SNR for playback, and 115dB SNR for recording.  They have captures from the slide show that give you a lot of information on what this card will do.
“We first broke the news about ASUS making sound cards over at CeBIT and DigiTimes followed up with an article yesterday stating Xonar D2X is using CMedia sound chips instead of ADI we initially heard. If that the case, Xonar D2/X is most probably based off C-Media Oxygen HD CMI8788 sound chip according to the specs we seen.”

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Audio Corner