Does anyone know if or when google intends to make this available for beta testing or public use?
Stable diffusion was un-neutered within 24 hours of its public release and the worst people do with it is Emma Watson porn.
A more cynical side of me just thinks Google is rushing out the PR (including the hand-plucked sample images) because they can see that the state of the tech is progressing rapidly and perhaps by the time their tech is release-ready a competitor will already have something better (the new round of betas certainly look promising.)
It is a little bit on brand for Google to make an announcement they have the best, only for those claims to fall over later.
The technology isn't special to Google. They don't control its proliferation.