Poking around I came across a very nice scenario by Jan Chipchase, which sounded downright Blogject-y to me:
With vehicle mounted (weather) sensors and positioning tools its possible to collect highly localised weather information - trucks, cars, motorbikes and bicyles recording and sharing in real time as they drive around the city. As you are looking where to park you know not to leave it there in that exact position because despite appearances you know the statistical likelyhood of it geting wet.
I've moved so far from all this stuff in the last few months. I really hope to get back and dive in real deep soon. First step is rebuilding my lost RSS subscriptions list.