$.bbq.removeState .. until I can add it into the full release

bbq-removestate.js

// Going into jQuery BBQ soon!
// http://github.com/cowboy/jquery-bbq

(function($){
  
  // Method: jQuery.bbq.removeState
  // 
  // Remove one or more keys from the current browser history 'state', creating
  // a new state, setting location.hash and triggering any bound
  // <window.onhashchange> event callbacks (provided the new state is different
  // than the previous state).
  // 
  // If no arguments are passed, an empty state is created, which is just a
  // shortcut for jQuery.bbq.pushState( {}, 2 ).
  // 
  // Usage:
  // 
  // > jQuery.bbq.removeState( [ key [, key ... ] ] );
  // 
  // Arguments:
  // 
  //  key - (String) One or more key values to remove from the current state,
  //    passed as individual arguments.
  //  key - (Array) A single array argument that contains a list of key values
  //    to remove from the current state.
  // 
  // Returns:
  // 
  //  Nothing.
  // 
  // Additional Notes:
  // 
  //  * Setting an empty state may cause the browser to scroll.
  
  $.bbq.removeState = function( arr ) {
    var state = {};
    
    // If one or more arguments is passed..
    if ( arr !== undefined ) {
      
      // Get the current state.
      state = $.bbq.getState();
      
      // For each passed key, delete the corresponding property from the current
      // state.
      $.each( $.isArray( arr ) ? arr : arguments, function(i,v){
        delete state[ v ];
      });
    }
    
    // Set the state, completely overriding any existing state.
    $.bbq.pushState( state, 2 );
  };
  
})(jQuery);