General support for some NoSQL data engines: CoachDB, MongoDB, MemBase, Amazon SimpleDB, Hardoop, etc.
Can be implemented via client-side DataSet manipulations with result sets from NoSQL engine.
And AnyDAC can provide general DataSet-based interface for working with NoSQL engine.
And it will be nice to have some direct access for NoSQL driver with specific API.
I vote for Amazon DynamoDB!
It can be implemented with some sort of native interface, and some sort of dataset-based. Native interface can be JSON-fied.
And it will be useful to have some interface to REST-based data sources from internet (like parse.com), maybe OData-compatible.
I have no idea about transport layer - should it be based on Indy/Synapse?
Maybe this cloud-based data access can be separate addon or separate product for DA-SOFT