The Linux Professional Institute (LPI) just announced the LPI-304 exam, titled Virtualization and High Availability.
The exam is elective for the vendor-neutral Linux Professional Institute Certification (LPIC)-3 and includes virtualization (Xen, KVM, OpenVZ, VirtualBox), load balancing, cluster management and cluster storage.
Interestingly, LPI has assigned a weight of 10 to the questions about virtualization theory and the ones about Xen, while just 7 to the ones about KVM, and just 3 to the questions about other solutions (OpenVZ and VirtualBox).
Like every other LPI exam, the LPI-304 is available at Prometric and VUE testing centers.