ATI has been shipping its R580 - the Radeon X1900 XTX - to them for some time. More than one source confirmed that ATI is preparing for a massive hard launch of its new line, as it will be able to ship the cards when it announces them. In fact, the cards are being sent to shops and OEMs as we speak and they are in production, so everything looks hunky dory for the Canadians right now.
We asked the same sources - and further afield - about Nvidia's cards and so far no one could confrim having seen a G71 not even a sample, which suggests that Nvidia is lagging somewhat behind ATI's agenda. There are still three more weeks till the end of January so the situation might change, but it's looking unlikely now.
Nevertheless, Nvidia did surprise us with the Quad SLI implementation it just announced in cooperation with Dell. That, indeed, was a well-kept secret that Nvidia managed to keep from its key partners, so we were not the only one surprised by it. Nvidia keeps its cards close to its chest these days.