Who knows, but Slashdot mentioned that it just might happen, according to this article on The Inquirer, who quoted this article on ComputerWorld.com.

I’m often asked about x64, and whether I recommend Intel vs. AMD chips in the space. The reality is, I don’t have enough knowledge to recommend one over the other. I couldn’t defend a position either way on this one. I know I love the memory capabilities of x64, no matter what chip you’re using in your DCs. :)

Is Server 2003 x64 media on the shelves yet? I haven’t heard either way. If you have a link please let me know, I haven’t seen one for sale yet.