I work at a very large enterprise and we've been in need of a cloud storage solution for the enterprise. Not where everyone shares the folder and all files are stored locally, but server-based cloud storage, so multiple servers can synchronize their folders for sharing in the local office. With A/D integration. And granular permissions.

We looked at all the usual suspects: Dropbox, box.net, google, amazon, etc. For some strange reason, no one seems to offer this service except for some niche companies that have immature products. I don't get why these companies aren't aggressively pursuing enterprise services.