There are other advantages to this beyond an alternative deployment method: Many vendor-supplied application stacks only support ESX. Yes, it is possible with s

There are other advantages to this beyond an alternative deployment method: Many vendor-supplied application stacks only support ESX. Yes, it is possible with some hacking, to get them on to EC2, but at the expense of losing vendor support. Furthermore, with this comes vMotion. EC2 has yet to implement live migration.