Ultimately it is a eventually consistent key-value store. They have map-reduce and a new meta-data thing that lets you query documents, but you really only wan

Ultimately it is a eventually consistent key-value store. They have map-reduce and a new meta-data thing that lets you query documents, but you really only want to use it if your data maps well to key/value (and lots of data does!). The really cool things are that it is truly horizontal scale - a new node brings read+write+map-reduce power, and that it will help you sleep better with its dynamo-ism.