Perl support of unicode

Hello,

As I understand, there is support for Unicode in Perl in the development
branch. When is a non-beta or stable version with support for unicode
expected?  (an approximate timeframe)

I would be very grateful is someone can tell me which is the actual status
of multithreading support for Perl (or which is the correct forum to ask
this question or resources where I can learn about it)

Thank you in advance

Best regards

Daniel