Waves could evolve beyond just text and simple image handling to be a sharing platform that encourages you to mess around with other peoples' stuff, whatever that other stuff is. And if you don't like how your stuff was messed around with, you can roll it back to a previous version. Then, as you say, you can aggregate your stuff as you see fit. Meanwhile, Google will be watching all the messing around that goes on and learning from it.

This could be a very useful capability for Semantic Web authoring, particularly when it comes to shared ontologies. In our current Tech Forecast issue (available at http://www.pwc.com/techforecast if you haven't seen it), we talk about the Sem Web techniques that enable for the first time what amounts to a metadata collaboration umbrella–a way to collaborate wiki-style cross boundary on data descriptions and nomenclature. The point of this is to eliminate information silos. This umbrella can be quite inclusive, encompassing data descriptions from folksonomies on the one hand, to taxonomies and ontologies on the other. We think ontologies will evolve to become the means enterprises use to abstract and model all the upper layers of the stack too–not just the data layer.