Or is the extent of the shutdown that tours of the whitehouse won't be given?"Due to staffing reductions resulting from sequestration, we regret to inform you that WhiteHouse Tours will be canceled effective Saturday, March 9, 2013 until further notice."†
The above action was fall-out from an earlier budgetary conflict, in which Republicans allowed sequestration (an across-the-board 10% cut in discretionary spending) to take effect, pursuant to the Budget Control Act of 2011. Sequestration was a poison-pill invented by the President and inserted into the BCA in the belief that the Republicans would never let it go into effect because of its effect on military spending. Well, they did.
†http://www.whitehouse.gov/about/tours-and-events