MediaMemes
Portable nodes showing fields of interest
A portable device, containing a scanner, a LED screen and a keyboard. Key(word)-users wearing a MediaMeme mingle amongst other visitors and try to summarize their conversaion into keywords and enter those into the device. The keywords can travel from user to user as memes, mapping the topics of interest people are talking about.
Instead of typing in the keyword of the conversation into the device, the device could also contain a voice recorder in which the users can speak their keywords.
The MediaMemes display the travelling keywords, which they collect from users nearby.