In today's Washington Post (and I think some other papers) a paid ad appeared from the Cato Institute that has a bunch of signatures by various climate scientists, directed at President Obama "with all due respect" questioning that global warming is happening and asserting that after accounting for population and property value growth, there has been no increase in damage due to climate disasters over time. Citations are provided for some of these assertions.
I shall only note that this last one is rather problematic. A source is claimed to be an article from 2005 in the Bulletin of the American Meteorological Society by Pielke et al. I googled and found no such article, but did find some statement by him addressed to "Stern Review." In that he says that while climate is a factor in rising disasters, they could not necessarily be tied to global warming, and that in the future they might be offset by rising population and property values, hardly what is claimed the petition/ad.
I did some further checking and found a figure showing natural hydro-meterological disasters over time. While 2008 is back down to about 350, about the same as 1998, that is still more than any year prior to then, with such numbers being below 200 mostly in the past, although getting over 500 in 2000 and 2002 and equaling 500 in 2005. In any case, not at all supporting the reported claims by Pielke. This figure is from a chapter by D. Guha-Sapir and F. Vos in a book out from Springer this year, and it can be found down a ways on the right with the full citation on a blog post by Andrew C. Revkin of the New York Times.