The big problem with vmWare and Rackspace is that you loos all control. Every thing needs to go through a Rackspace tech and you loose all visibility. No sir, you can have access to the VmWare console, leave that up to us. In the mean time the system is not working just fine, and you have no idea why you VM's sometimes 'pause' for a couple of seconds setting you loadbalancer on fire.
Ooo and btw, no you can only have RH 5 installed, RH 6 doesn't work on VmWare, whaaaaaaaat?