The election has been a watershed in interactive and social marketing with the first really mainstream multi hundred million dollar use of social media for one campaign. There is a lot to be said about this (beyond hero worshipping Chris Hughes and co.) and I intend to post a few comments about this here.
The best recent completely novel use (that simply couldn’t have existed 4years ago) was run by the causes application. They asked users to donate their statuses to the vote and changed the status to a link and a message to promote an issue in the election or the election itself. Below is a screen dump of how you do it on the causes application.
My understanding is that 5MM plus users donated their status to promote something to do with the election. I am not going to comment on the impact of that on the election but the impact on Causes is incredible. Every one of those status updates (whichever candidates or propositions were being pushed) promoted the causes application. Given the prevalence of status updates in the newsfeed it is almost certain that every user in the US will have seen the causes application promoted on election day and that real estate was immensely valuable.
There are more ways to game this system and that is in fact a pretty scary spaming opportunity now the idea is out there but this was a truly viral campaign using something that is unique to facebook. Great job causes even if there are debates about whether this is a fair or genuine use of status updates.