Google Services Suffer Downtime
Earlier today, some key Google chat services were unavailable to users. Google+ Hangouts and Google Talk suffered disruption of service for roughly three hours today, spanning from around 12:22PM EST to 3:28PM EST and 12:27PM EST to 3:28PM EST, respectfully. Initial reports of the services being down came in just before Google noted the issue, and as the disruption of service was fixed for both, more and more users were able to slowly access Google+ Hangouts and Google Talk. Google Sheets was also affected, with its service disruption lasting from 12:27PM EST to 2:44PM EST.
Due to the update, Google has apologized to users of its affected services, and has noted that reliability of its system is a top priority.
Source: Google Apps Status