http://consumerist.com/2008/11/18/are-you-so-loaded-that/

Are you so loaded that you exceed the FDIC’s guarantee limit for deposits? Consider the Certificate of Deposit Account Registry Service. Deposit the funds at one of 2,500 CDARS member banks and they’ll automatically spread your cash among other member banks as needed to stay within FDIC coverage limits. Kiplinger says, “You’ll earn one rate (set by the home bank) and get one statement and one form at tax time.” [Kiplinger]