We are beginning to see a blurring of the distinction between on and offline, manifested in lots of different ways.
One of the most obvious is geotagging- attaching metadata to specific locations.
Yellow Arrow was one of the first, deployed with stickers and SMS.
Socialight is a virtual system of stickytags your mobile can see.
Tagmaps uses geotags to create maps that represent how we see the world - a weighted tag map overlay shows what people collectively think the salient features of a locality are, in a way that normal maps can't - for example, normal maps don't understand that things are different at night.
And when you can point and click on the real world, what does offline mean?
