It’s back, and, as Sandy pointed out in her comment above, the apocalypse did not take place, despite a sense of doom that comes from being disconnected in the 21st century. It will be interesting to see why Gmail went down. It will also be interesting, with this being the latest example of a free service providing a service level commensurate with its cost, whether users with a need for reliable service with a real-world SLA will start wondering why they think free is the best way to meet their needs.