Just to affirm: (From winxp.bink.nu)
Microsoft Corp. this Friday announced it has released Windows Server 2003 to manufacturing alongwith Windows XP 64-Bit Edition Version 2003 for Intel Itanium 2 processor. Even before the release of Windows Server 2003, people were curious and asking whether Microsoft is interested in releasing a Server 2003 version for AMD-64 or not.
Well ... here we have found some evidence which shows that they do plan to support AMD64 when it comes out. Though a bit late for them. But considering AMDs slow release, its not yet too late.