All IO are implemented as files

1. Mount manager, (http://code.google.com/p/naclports/source/browse/trunk/src/packages/scripts/?r=343#scripts%2Fnacl-mounts)?
2. Non-persistent filesystem mountable on any input channel, by loading it all into RAM and mounting using MemMount from nacl-mounts
3. TempFS in-memory filesystem ( mem-mount from above naclmounts project ?)
4. Network IO represented to ZeroVM program as RO and WO files (nacl-mount would be great for that)

Everything comprehensively tested, but right now 100% coverage of third party code is not a requirement.

No need to implement now ZFS-based filesystem as we talked previously