Developer SKGleba has released a PlayStation Vita boot rom hack, which would typically be the holy grail of console hacking.
But here’s the catch: the exploit only works on prototype units running on firmware 1.03.
In other words, this release is really cool for those of us who like to think of themselves as "historians" of the scene, and people who want to understand the inner workings of a console hack, but will not be directly useful for the vast majority of Vita users.