I have a Google account, and it is perfect. I use the gmail UI to send and receive email from my own domain name, which I use for work and personal email; I then have a gmail address which I use when I am signing up for sites that I expect to receive spam from - I can use both of these simultaneously just selecting which account I want to send from. I have Google+ which I have set up granular permissions, so that certain people can only see certain content. I have a Youtube page, which is connected to my Google account but uses a separate alias completely separate from my real name, which I automatically become when using Youtube. There is no public facing connection between my real name and my YT alias, and I never have to switch accounts or select which one I would like to use.
I might be missing the problem, but to me it seems straight forward and logical.
Currently hosting on meteor.com is mainly meant for demoing and testing, not as a stable production enviroment. However, with the release of Meteor 1.0, the Meteor Development Group will launch Galaxy, which is a production ready hosting managed hosting platform.
In same way, no one except 'us tech nerds' care about IPv4. Why would anyone who does not have to work with it, or have an interest in tech, care about protocols?
Overall, the UI is clean an intuitive - nice job!