offer a NoSQL data storage solution
Looking for the following features:
Cloud hosting and local embedded (unit testing friendly would be essential)
Clean lightweight API for C#.
Functional API for F# as well as F# immutable types friendly, naturally a type provider to go along.
Matt Warren commented
Take a look at RavenDB, it's written in/for .NET and has a lot of these features, see http://ravendb.net/
David Grenier commented
It would seem Trinity fits the bill, although that thing looks freakishly powerful. It would be great if the F# team started working on an abstraction layer to make it look simple for mortals like me :)