Oracle VM Server for SPARC which is also well known under its more conceptual name Logical Domain - or in short LDOM - has its 10th anniversary.
And it gets better every year - we just announced its version 3.4.3.
Besides the built-in management capabilities and those found in Enterprise Manager (Ops Center), there are tools available from Oracle partners which also offer management of LDOMs - like JomaSoft's VDCF. Yesterday Marcel Hofstetter, CEO at JomaSoft and Oracle ACE Associate "Solaris", gave a detailed, technical live demo in a webcast on this virtualization management framework for Solaris, both for LDOMs as well as zones. A recording is available.