IT Week reports a possible scoop about forthcoming VMware codename Fusion capabilities:
It should be noted that OS X is not one of the operating systems that can be run on another virtual machine, however. Virtualised OS X remains a sticky subject because Apple will not allow its operating system to run on non-Apple hardware.
VMware has hinted that it might enable virtualised instances of Mac OS X by implementing some sort of check to make sure that an OS X virtual machine was running on Apple hardware, but so far it seems that OS X will remain walled off from the world of virtualised deployment.
If this feature will be confirmed, maybe through an exclusive deal with Apple (which is unlikely but possible), Parallels may find more difficult maintaining interest of Mac OS users.