The news is full of talk about the "payroll tax reduction" bill that might have passed the House yesterday. Actually it's the FICA tax they are talking about. Used to be, FICA was levied only on the first $110k of income, income over that limit was not subject to FICA.
According to Tax Prof here, the new law levies a 2% FICA tax on all income over the $110k cutoff point. That's a pretty stiff tax bite. And right out of the blue, too. This is the first I'd heard of this new "revenue enhancment".