A SASS mixin for generating a sprite declaration block that will work with media queries. UPDATE: Having offset-x & -y are very nice ;)

get-sprite.sass

// http://compass-style.org/reference/compass/helpers/sprites/
@mixin get-sprite($map, $sprite, $offset-x: 0, $offset-y: 0, $repeat: no-repeat, $height: true, $width: true)

  //http://compass-style.org/reference/compass/helpers/sprites/#sprite-file
  $sprite-image: sprite-file($map, $sprite) 
  
  // http://compass-style.org/reference/compass/helpers/sprites/#sprite-url
  $sprite-map: sprite-url($map)
  
  // http://compass-style.org/reference/compass/helpers/sprites/#sprite-position
  $sprite-position: sprite-position($map, $sprite, $offset-x, $offset-y)
  
  // Returns background
  background: $sprite-map $sprite-position $repeat
  
  // http://compass-style.org/reference/compass/helpers/image-dimensions/
  // Checks to see if the user wants height returned
  @if $height == true
    // Gets the height of the sprite-image
    $sprite-height: image-height($sprite-image)
    // Returns the height
    height: $sprite-height
    
  // http://compass-style.org/reference/compass/helpers/image-dimensions/
  // Checks to see if the user wants height returned
  @if $width == true
    // Gets the height of the sprite-image
    $sprite-width: image-width($sprite-image)
    // Returns the width
    width: $sprite-width

Very nice, thanks