Here is my Mint op-ed on the case for raising marginal tax rates - both individual and corporate - and eliminating exemptions.
Update 1 (18/10/2010)
Mankiw had this op-ed which claimed the possibility of reduction in his incentives to work when faced with higher taxes. Barry Ritholtz raised ten questions for Mankiw, all of which gives the impression that he may not be himself acting on his own advice. See David Leonhardt's summary. See also Mankiw's partial response here.