OVH now offer hosting packages for almost anyone using almost every hypervisor !
vps
entry level dedicated
enterprise dedicated
mini cloud
DIY cloud (using your choice of - kvm, openvz, proxmox, vmw, xen)
Virtualisation on Ubuntu howtos
Amazon VM Import can now import VMs to EC2 from VMware vSphere, Citrix Xen and M$ Hyper-V.
VM Import is available at no additional charge beyond standard usage charges for Amazon EC2 and Amazon S3.
Red Hat RHEL 5.7 has increased virtualisation speed for KVM and XEN
rpath X6 supported hypervisors and virtual targets
cheapvps.co.uk provide KVM, OpenVZ and XEN hosting !
XenSource have a directory of XEN webhosts
and there is a searchable list of XEN and other webhosts at VPSChoice !
revised XL tool stackcredit2 scheduler new Memory Access API automated regression tests
CloudMin can help you manage KVM, OpenVZ and Xen clouds.
VirtualMin have also made available some VirtualMin & EC2 AMIs you can try out for yourself.
http://www.virtualmin.com/documentation/aws/virtualmin_gpl_ami/
According to The Register NASA have started to build a private Nebula Cloud based on Ubuntu 10 and Eucalyptus Enterprise 2 which will likely underpin websites across the federal government.
Eucalyptus Enterprise works with the Xen and KVM hypervisors and the latest version has now been ported to VMware hypervisors as well, allowing for installation atop VMware’s vSphere, ESXi, and ESX virtualization technologies. The Eucalyptus Enterprise edition also includes an image converter that helps users develop VMware-based applications that are compatible with Amazon EC2.