1. new version is a matter of few weeks
2. not immediately have a week calendar – future plugin will be extendable, by additional plugins anyone can write, using WordPress hooks and filters, without need to hack the core plugin. – Me and the others might provide a week calendar type afterwards, but we want to put some thought in how it would work and display. It will likely be an additional plugin.
3. if you are a developer you can have a look at ongoing work at: https://github.com/moonstonemedia/WP-Google-Calendar-Events/tree/refactor (refactor branch) – consider it an alpha, not suitable to be installed in public websites yet
of course once all this is nicely put together we will try to publish more docs organized in a website, with a list of available hooks and some developers documentation