I've noticed that the JSON API for Google Cloud Storage is, as it says, "Experimental", and that the URL's I'm supposed to use all have 'v1beta2' in it. It looks like it hasn't been touched since May 7th, and I'm wondering if it's worth creating a new project with this service as primary storage service if I'd want my app to go live in a month or two. Is there a release date somewhere, or is it more like "it'll take as long as it takes"-kinda thing?
The Google Cloud Storage JSON API is marked "experimental" to mark it as an exception to our deprecation policy. As we bring it to full release, there is a chance we may make some changes to the API, and this is why you see the special URLs. We don't have a date yet for full release. You should be able to use it just fine, if you are prepared to migrate your app to the official API when it is released.