Read the article. Even the WHO has changed its statement, which is now "WHO estimates there may be up to 9,000 excess cancer deaths due to Chernobyl among the people who worked on the clean-up operations, evacuees and residents of the highly and lower-contaminated regions in Belarus, the Russian Federation and Ukraine." The two researcher just mentioned that much fallout was in other countries as well. The claim of 4000 total number of deaths doesn't hold if you exclude a big part of the affected population.

I would file XUL Applications under Web 3.0. Your link points to a great website, and more like this could improve the web a lot. But it has not much to do with Web 2.0, which is more or less covering "social networks", tags, rid.iculo.us domains, ... not only user interfaces which provide more responsivness than, for example, slashdot.