VMware beats competition with true HOT-Add Features:
Virtualization.info noticed an interesting new feature in VMware Workstation 6.5, true hot-add for Disk, CPU, and Memory on Server 2008 guests!
This became possible for ALL hypervisor vendors since the Dynamic Hardware Partitioning (DHP) technology Microsoft started implementing in Server 2003 SP1 but fully implemented in Server 2008.
Microsoft dropped highly touted plans to include this in May of 2007 in its first Hyper-V release which opened the door for other Hypervisor vendors like VMware to take advantage of it first.
Normally VMware adds features first to VMware Workstations products and then they show up in the ESX product line..so many expect this to show up possibly in the ESX 4.0 product.
Please see more info in the full article.