EMFS: Repurposing SMTP and IMAP for Data Storage and Synchronization
  Cloud storage has become a massive and lucrative business, with companies like Apple, Microsoft, Google, and Dropbox providing hundreds of millions of clients with synchronized and redundant storage. These services often command price-to-storage ratios significantly higher than the market rate for physical storage, as well as increase the surface area for data leakage. In place of this consumer-unfriendly status quo, I propose using widely available, well standardized email protocols like SMTP and IMAP in conjunction with free email service providers to store, synchronize, and share files across discrete systems. 
William Woodruff
cs.NI