QSL Cards as a Way of Tracking Open-Source Software?

jerryasher asks: "I get a kick out of examining my logs to see who downloads my software, and from how far away. I was downloading md5summer one night, and came across this suggestion from its author, Luke Pascoe: 'So if you like MD5summer, send me a postcard.' Well this is a brilliant suggestion, and one that nicely borrows from our Ham radio heritage. This is what Ham operators do when they make contact with each other: each Ham operator designs a QSL card that describes himself and usually his location. On making contact with someone on the air, they exchange these postcards. So let's start sending QSL cards to each other!" Interesting thought. Might some of you be interested in doing this?

"It's always encouraging to receive a thank you for your work, and that's what a QSL card would be, a personalized thank you and memento from each downloader. It would be good for the community too: if we are working for our egos, then QSL cards would be an inexpensive way to boost a developer's ego. (Considering how few of you are clicking on that PayPal button, perhaps you might be motivated to buy a stack of QSL cards and to send them out)

It would be good for the economy: buying, printing, sending QSL cards will help developers, printers, and the post office. And it can be good for our projects: we might find that in addition to tee shirts and coffee mugs, our development projects can sell a variety of promotional QSL cards to developers to send to others.

So how do we turn this into the meme for 2002?"