Our colleagues from VR-Zone have reported that Nvidia told its partners not to show the 9800 GX2 during CeBIT, at least not to make a public show.
We can confirm that some of the partners are trying to get the hacks to sign NDAs, with their blood would be nice, if you ask Nvidia. This is nothing strange, since the last reported launch date for the 9800 GX2 is March 11th, which is only a few days from CeBIT. This doesn't mean that there will be no leaks, as you may know from the past, leaks do tend to happen.
NDA or no NDA, the 9800 GX2 will be present at CeBIT, and according to what we could see so far, it might be even used to heat up CeBIT halls; remember that "don't touch, too hot" sign? Last time yours truly saw that sticker, it was on top of an old laser printer.
You can read the VR-Zone's post here.