I am happy to announce that Percona Server and Percona XtraBackup are now available for the Solaris platform!
There are couple features not available in Solaris build of Percona Server: Response Time Distribution (it depends on GCC platform specific functions) , HandlerSocket ( compilation issues on Solaris), Maatkit UDFs.
I want to say a special thanks to Joyent (a cloud computing provider) for Solaris resources and help with building binaries. Joyent provides templates for Percona Server and Percona XtraBackup by request.