Is Server Fault out of public beta?
If so, when did it happen? Do you have a reference?
I don't know that the public beta ever ended.
The term "beta" is only used loosely in this context as the underlying software was fairly mature at this point -- we had already done a private beta, public beta, and formally removed the literal, encoded-in-the-darn-html "beta" tag on Stack Overflow itself (in Jan 2009 as I recall?)
And since it's essentially the same software..