Good grief, it's been 8 months since the last release! Well, I've finally made the call and tagged the current version as 1.52.
New zips of the source code, docs, and binaries are up on SourceForge. I've removed the API docs and binaries from the GIT repository, because they were bloating it too much - they're now available as direct downloads from the sourceforge project page: https://sourceforge.net/projects/juce/files/juce/1.52/
Can't really remember all the major new features since 1.52, but it feels like there have been a lot! For me the most significant change is that I've spring-cleaned a huge amount of the codebase since that version - the coding standards are now pretty damn good throughout the library.
I know most of the hardcore juce-folks have already been following the bleeding-edge for a while, but now there's no excuse not to update! Have fun!