I thought this was interesting - a blogger called DR Tucker describes his conversion from scepticism to alarmism:
I began reading the report with a skeptical eye, but by the time I concluded I could not find anything to justify my skepticism. The report presented an airtight case that the planet’s temperature has increased dramatically (“Eleven of the last twelve years [1995-2006] rank among the twelve warmest years in the instrumental record of global surface temperature [since 1850]”)
If one recalls Doug Keenan's WSJ article, it is absolutely clear that we don't even know if the Earth's warming is statistically significant, let alone that it has "increased dramatically". Far from being airtight, the IPCC case looks like a sad old football, left outside over the winter, battered by ice and snow, and now rather deflated.