I'm trying to find some documentation for G+ Search but failing. The pages in Google help are minimal.

- Can I turn a "most recent - everything" search into a URL? The saved search URLs default to "best of".
- What parameters are available eg +, -, OR, AND, ' Are there others?
- Where's author: and commenter: that we used to have in Buzz. Are they available yet? Planned?
- There is an API for public search that returns JSON activities. It would be cool if this could return Atom/RSS but then that's a general comment on all the G+ APIs. Coming soon, right? It needs an API key, but at least it's not authenticated.46-71 Trinity Rd, Ware, Hertfordshire SG12 7