VMware (NYSE: VMW) is taking some heat because the virtualization company’s forthcoming public cloud will not be based on OpenStack, the open source platform. Some critics worry VMware’s approach will lead to an expensive, closed platform. But let’s do a reality check, folks: Take a look at many of the major public clouds – Amazon, Google Compute Engine, Microsoft Windows Azure – and there’s nary a mention of OpenStack. Even Oracle now has built a $1 billion cloud business without thinking much about OpenStack. So what’s the message for partners?