Ubuntu will power HP's new cloud service
arstechnica.com
arstechnica.com
I might be unpopular for saying it, but WebOS was never a great fit for HP, and they did the right thing to kill it before they ended up in a situation where they had to support an unpopular platform. Maybe they should have spun it off, but keeping it as a HP platform didn't make sense.
The hard reality is that while these operating systems (like HP-UX or Solaris) may still have some technical or commercial advantages, what really matters when you want to scale is the predictability and support for all kinds of cheap/expensive/old/new hardware and the availability of up-to-date software packages, and you really can't beat Linux there.
KVM is mostly seen as a RedHat technology these days in the Enterprise, because RedHat provides most of the support for customers. I suspect in this case HP have built the expertise in-house.
The KVM people will be pleased to see this endorsement because most large public clouds (eg Amazon and Rackspace) are on Xen, and VMWare dominates the enterprise. KVM seems to have been stuck in the middle a little bit - used in a few enterprises, but not as many "name brands" as VMWare, and used in a few hosting providers, but none as big as Amazon and Rackspace.
They have had other wins (I think Oracle's enterprise virtulization is KVM based (not VirtualBox)) and I think IBM and Dell use it too. But none of them run public clouds.