Oh, so you still send snail mail? Boobytrap envelopes by recording 10-second-long messages on these rewritable talking envelopes, which cost $US4.75 for a 10-pack. Be sure to address them in pencil only, though! [SoundExpression via RedFerret]
Think about it: US Postal Service employees actually opening and scanning all your letters, and then sending you emails with their content with the option to receive the physical letter if you choose to. Scarily unreal? Not if you’re Finnish.