What a superb project! Forget Mechanical Turk — this is the way to harness the collective intelligence of humans: transcribing weather observations made by naval ships at the beginning of the twentieth century. It's all grist for the climate model mill.
An excellent way of visualising weather. Brighton is currently like Hoth.
A nifty mashup in which Twitter bots update twice a day with weather updates. I am now friends with Brighton Weather. I feel so in touch with nature.
I think it could be fun to mash up events (via location) with weather. This API would let me do that. How useful would it be to know what the weather would be like before coming to dConstruct, for instance?