Sun has a great new edition of Solaris aimed at developers.
"Solaris Express Developer Edition is an OpenSolaris-based distribution for x86 that includes the latest tools, technologies, and platforms to create applications for Solaris OS"
It includes Sun Studio 11 pre-installed, as well as NetBeans & Web 2.0 tools, StarOffice 8.0, Solaris + AMP and much more. The OS is Solaris Express Community Edition build 55. This edition is x86 only.
There is also a VMware packaged edition on the link below. I tested that 64-bit download in VMware Server and it worked really well.
Sun Developer Site : Solaris Express Developer Edition
Sun Developer Site : Download Page
