Interesting idea:)
Edit: thinking about it more this is simple enough to be an easy thing that everyone can do. If we could have a little automated widget that you could click to generate it even better.
The concern for me would be about how soon social networks would start cracking down on this or if they could crack down on it?
I like the idea a lot though because it is a simple and easy form of advertising which deals with the idea suggested by @winstonwolfe and others where you let others find things out for themselves by creating curiosity.