They also have an article on the hurricane stuff (which I've read) about the Webster paper in Science (which I've just skimmed). But the abstract is:
We examined the number of tropical cyclones and cyclone days as well as tropical cyclone intensity over the past 35 years, in an environment of increasing sea surface temperature. A large increase was seen in the number and proportion of hurricanes reaching categories 4 and 5. The largest increase occurred in the North Pacific, Indian, and Southwest Pacific Oceans, and the smallest percentage increase occurred in the North Atlantic Ocean. These increases have taken place while the number of cyclones and cyclone days has decreased in all basins except the North Atlantic during the past decade.
...hurricanes in the strongest categories (4 - 5) have almost doubled
number (50 per pentad in the 1970s to near 90 per pentad during the past decade) and in proportion (from around 20% to around 35% during the same period)...
We conclude that global data indicate a 30- year trend toward more frequent and intense hurricanes... This trend is not inconsistent with recent climate model simulations that a doubling of CO2 may increase the frequency of the most intense cyclones, although attribution of the 30-year trends to global warming would require a longer global data record and, especially, a deeper understanding of the role of hurricanes in the general circulation of the atmosphere and ocean, even in the present climate state.
Well, interesting stuff, somewhat complementary to Emanuel. A thing that struck me, and isn't mentioned in the Econ or Science (as far as I could see) is that "hurricanes only form when SSTs are over 26 oC", and the region with the most obvious increase is the N Atl, which has the lowest SSTs, and so might be "unsaturated" and more liable to increase (whatever that might mean).