Supposedly Facebook is trialling them with cold storage -- think backups they must keep legally but don't intend on using much. I could see a usecase for certa

Supposedly Facebook is trialling them with cold storage -- think backups they must keep legally but don't intend on using much. I could see a usecase for certain NAS / media storage purposes, but you'd have to not only use log structured filesystems, but also redesign the network protocols to support efficient writes, and possibly specialize block allocation to match the hardware constraints. You certainly wouldn't want say bittorrent writing directly to them, and even streaming-like services like MythTV may be a problem.