Burn Note a "vanishing" email service

Burn Note a "vanishing" email service [AllThingsD] This is so brilliant. The question is, can an email ever really be destroyed? The answer: probably not. So just remember  kids, don't ever write anything that you wouldn't want published on the front page of the Times.
Burn Note, which opens up to the public today, allows the sender of an email to set a time frame in which the receiver can read an email before the email disappears. At that point, the email no longer exists — anywhere. There are no standby servers, or backup copies of emails. The company uses a storage engine that has no journaling capabilities, and an underlying file system that logs metadata but not the content of the notes themselves.
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