This leaked last week, early onto the French Canon website, see specs in French, from the days after the leaks. Now there is a full blown Canon microsite for the EOS 1-D Mark 2.
Personally I am more interested in the new lenses, the EF 28-300L F3.5-5.6 IS USM
and also the EF70-300DO F4.5-5.6 IS USM. Full press releases are on the PhotographyBLOG website, 28-300 and 70-300.
I am a big fan of the existing 28-135 IS lense, which I wrote about a while ago as the perfect travel lense. The 28-300 looks like it could be the replacement for both it and a 70-300 for the travelling photographer. It does weigh in at 1670 grammes though, so it is not exactly light. However it is dust and waterproof and has a modern IS system. My one gripe about the 28-135IS is that is not a fixed length lense, so the body moves which can allow dust to enter the body of the lense. It is really a replacement for the now aging 35-350L, which was always a little too expensive and too wide for my liking.
The new lenses are said to be available in May 2004, though no word on pricing, yet. It will inevitably be for sale from Jessops.
UPDATE:
Following on from the comment below, I checked EOS magazine and the prices are quite a bit higher than the US equivalent might lead you to believe.
£1049UKP for the 70-300DO IS and as Christopher notes £2049 for the 28-300L IS. This leads me to a thought that the current market price for the 70-200 F4 L at just over 500 is great value. It will be interesting to see what price the two new lenses settle down to, the 28-300 is quite expensive.

It looks like we may have to pay through the neck for the EF28-300 Lusm IS here in the UK.EOS Magazine have released details and given the price of