Syncany: A Great Dropbox Alternative Which Supports Multiple Storage Types ~ Web Upd8: Ubuntu / Linux blog: "Syncany is a brand new open-source file sync software (similar to Dropbox, or Sparkleshare). 'Oh no, not another Dropbox alternative' you might say. Well Syncany is different and has the chance to become better than other such applications."
Sem dúvida a explorar! A encriptação no cliente e as múltiplos pontos de destino do Backup (inclusive uma conta de GMAIL via IMAP) são muito interessantes!