I may have blogged about this a while back, but it's worth a bump anyway. The Georgia Public Policy Foundation, Georgia's representative in the state-based free market think tank network, sends out a weekly email called Friday Facts, the archive is here, and you can sign up for it here. They're great facts to have in your back pocket; this week, for example, they've got a bit about New Mexico lowering their income tax rate (dramatically, actually) and showing an increase in tax revenue, so you can toss that in for your Laffer curve discussions. There's also a link to a study looking at overinsured Americans in terms of health care.
I recommend. Friday Facts gets the TPS Seal of Approval.