Thanks to a Zunerama member, Trastan, there's now a simple ID card available that you can send to other Zune owners when you find yourself within wireless range of another Zune. To use the card, you download it to your device and then sent it out wirelessly using the Zune's built-in wireless send feature. This is a friendly way of saying "hello" to the other Zune users around you.
On the card says "Nice to meet you" and provides a brief intro that displays your Zune Tag and favorite genre. The cards aren't being generated by an app - there's pure manual labor involved. Trastan is creating cards for anyone who requests one on this forum post. There are also some blank backgrounds here if you want to design your own. (via/img via Zunerama)