Actually there seams not too much of the world outside Debian for me, BUT today I discovered for myself a concept of biofilms. It came up with a chat with a beutiful girl that aims to study microbiology.
It appears like bacteria floating in water and bacteria attached to a surface are two compleatly different things. When bacteria joing a biofilm colony it activates different genes and starts producing 'glue' to attach to the carrier surface. Many bacteria can have their resistances increased by a factor of 1000, the colony can even have a rudimental work separation among the bacteria. Thus a primitive selforganising multicell organism is formed.
And somehow I again start to see the relation of this to the free software community ... oh, no - I am hopeless! :D