10gen recently announced a cloud-based backup service designed for MongoDB. Here's a slice of the announcement, the rest of which you can read here.
“The Backup Service solves a critical problem for ops teams and developers. It is challenging to build backup systems that are reliable and robust, and moving data between environments for testing and other data workflows is something developers shouldn’t have to build themselves,” said Eliot Horowitz, CTO at 10gen. “The Backup Service is a key step for us as we continue to build out a full management suite for MongoDB systems of all sizes in the cloud and for on-premises environments.”