Cloud computing is all very well until someone trips over a wire and the whole thing goes dark.

Reddit, Foursquare and Quora were among the sites affected by Amazon Web Services suffering network latency and connectivity errors this morning, according to the company’s own status dashboard.

Amazon says performance issues affected instances of its Elastic Compute Cloud (EC2) service and its Relational Database Service, and it’s “continuing to work towards full resolution”. These are hosted in its North Virginia data centre.