The maintenance of Strawberry Perl is not in parallel with the development of Perl in general. I'm sure the developers are working on it. It has its own architectural issues that go beyond merely compiling Perl and releasing it.

If you really want to know the release date, check in with the guys at #win32 on irc.perl.org.

ActivePerl provided builds for 5.14 for a while. It's sure not as 'pure' as Strawberry but still very usable.

No news. Strangely, it's apparently quite easy to compile 5.14 source with the dmake and compiler coming with strawberry perl 5.12.3, so I don't know what can be the problem.