Using multiple Google accounts
Reading Google’s blog I learned that Google has released a new option that allows us to log in to several Google Accounts at once, which Google calls “Multiple Sign-in”. Google has been testing “Multiple Sign-in” for a few days, and now is being gradually implemented for all Google Accounts.
The possibility to use different Google accounts at once will only be available for some Google Apps like: Gmail, Calendar, Reader, Sites, Voice, App Engine, and Google code.
The Multiple Sign-in will be quite useful, especially for those who have many clients, and each with a different Google account.
Once you’re on, you’ll be able to configure it from your profile page.