MACN BACN

So BACN is the new new thing. As of last weekend it is the term to describe emails that you want to read, just not yet. This might have interesting implications for creative agencies - can they create email programmes that store themselves in a BACN BANK (BANC?) until you're ready to read them? Can they be tagged by the user or the brand to stop going into spam filters? Can we create BACN PACKETS of user-chosen content that waits patiently to be read at the right place and right time (distributed content?) or time-expires? And are branded (opted-in) emails by definition BACN not 'spam'?