[jlarocco]

If I'm currently logged into my work GMail account and want to check my personal email, I logout, and it brings me to a login page with my work GMail account displayed, and a password field. Below that is a "Sign in with a different account" link, and if I click it both my personal and work email accounts are shown.

I've also noticed small things like the avatar image I set at work becomes avatar image for my personal account.