Implementing a virtual file system in .NET

Question

A while back a found a great-looking framework that allowed .net developers to implement a virtual file system. I thought I had bookmarked it, but it seems I haven't.

Does anyone know any frameworks for doing this?

EDIT: Here's a hint... It had a catchy, short name and it's own domain. Sorry, that's all I can remember :p

Answer 1

Found it just now (happy!)

Dokan

Answer 2

Could this have been it?

http://www.codeproject.com/KB/vb/QVFS.aspx

Answer 3

What about http://vfs.codeplex.com/ or http://code.google.com/p/sharpfilesystem/