I'd love it on the 1D-MkII
802.11g however, not like the USB 1.1 fiasco.
Perhaps I can shed a little light on this.
First of all, in general terms, wi-fi is simply a wireless connection to a computer network. You can have a wireless access point connected to your own local area network, in which case any device fitted with a wirelsss card is connected to that network as if it were connected with a wire. At that point the issues become range and transmission speed.
A decent wireless access point will permit a reliable connection within a couple of hundred feet if there are no obstructions, and somewhat less indoors depending on walls, etc. You can have multiple access points on the same network, so you can extend the range by placing them at various spots within your environment.
802.11g is currently the fastest of the variants, and is backwards compatible with 802.11b, which was the most common previous protocol. You can mix b and g devices on the same network with no performance penalty.
If the network you are connected to has internet access, your wireless device has the same access to the internet as any other device on the network. Increasingly, public places are providing wi-fi access. Most US Starbucks locations have public access, as do a number of public places, including many airports, stadiiums and arenas.
So what is the significance for a photographer? And what are the issues making a wi-fi device useful with your camera?
In the studio a wireless device connected to your camera would theoretically allow you to download pictures to a computer during a shoot. Depending on how the device worked (more in a minute) this could facilitate a situation where someone could be reviewing and processing pictures while the photographer was shooting, and could reduce the number of images to be downloaded by the photographer when the shoot is finished.
On location there are even more interesting possibilities. Since a wi-fi device is itself a device on a network, one possibility would be to transmit images to an internet address without ever downloading them to a local computer.
But how useful such a device is in the real world depends on how much control the photographer has over how it operates. As capable as 801.11g is, it is no match for 8mb/8fps. It would quickly back up with any normal shooting volume with a camera like the 1DMKII or the ID or Nikon D2H for that matter. So the ability to control (a) which images are transmitted (e.g. distinguishing between jpg and raw, or designated selected images), and (b) when they are transmitted (e.g. real time, when the camera is idle, when a function button is pressed, etc.) are critical in designing these devices so they are really useful rather than wiz-bang techno-toys.
Again, since a wi-fi device is just another node on the network, two-way communication is entirely reasonable, and there is no reason why someone could not communicate with or even control the camera from another computer, while the photographer is at work or even with an unmanned camera. Imagine someone being able to review and select images for download while the photographer is still shooting....
Since any of these cameras can communicate with a computer, including remote control, via a firewire port, there is no reason why any vendor with access to appropriate Canon SDKs could not produce a very functional wireless device. The way the 1D is desgined it would be an external device, but the hardware could be very small, use little power, and the software potential is pretty much limitless.
Within a relatively short period of time these devices will abound, with functionality ranging from transmitting to your own computer or storage device, to full-blown two-way communication for immediate transmission of images to remote locations.
We are really entering a whole new age in the way images are handled, and I would be surprised if these wireless devices will not shortly become as much a part of a professional photographer's kit as lenses and memory cards.
Kenny Frank