Google enabled instant switching between accounts

As you know, Google services are popular both for business and for personal use. That is why, many users often have a need to switch from working to personal account (for example, to check mail). This required multiple logout/login procedures. But now this process will be much more easier - Google is rolling out multi-account sign-in that allows to switch between accounts using the top menu. You can activate this feature and add accounts on this page. However, switching between accounts will work not for all services - only for GMail, Google Calendar, Google Reader, Google Sites, Google Voice, App Engine and Google Code. In addition, those who activate multi-account sign-in - would have to to give up the offline features in Gmail and Calendar. Recall that soon another related problem will be solved soon - some personal services (Google Reader, Blogger, Youtube ...) will become available in Google Apps accounts.