Fusion-io CEO and co-founder David Flynn resigned because he realised he didn't have the operational management skills needed to grow Fusion-io into a global business. That, in a nutshell, is what we understand after talking to replacement CEO Shane Robison.
XACML doesn't exactly roll off the tongue or set hearts racing – El Reg has seen fit to mention it one whole time in our web history.
There are hypervisors that chop a single server into virtual bits, and other hypervisors that take multiple servers and make them look like one big virtual one. ScaleMP's vSMP hypervisor is the latter kind, and can be used to create a shared memory x86-based system that runs Linux that would normally require special processors and chipsets. And a much higher price tag.