A week ago we saw Nigerian/419 scam spammers trying their luck with images. Recently, we came across a submitted sample that uses Yahoo! Calendar instead of regular email to send Nigerian/419 scams:
For those who are not familiar with this free service, Yahoo! Calendar allows users to schedule events and send invitations to others. In this instance, the invitation asks the victim to meet with the supposed barrister to transfer $15.2 million worth of funds. Other than the use of an electronic invitation service, the message itself is quite ordinary. Since these messages are received in the same way as emails, there is very little difference between the two. Therefore, it is unknown if this kind of spam will ever become commonplace, or if this will be a one-off experiment.