Sold in two slightly different versions at the same price - one with a clear front shield covering the iPod touch's face, the other completely open - PDair's Aluminum Metal Case for iPod touch ($28) covers the majority of the iPod with silver or black aluminum, padded internally with neoprene. A detachable black plastic belt clip and silver lanyard necklace are included with each case, which flips open to provide complete access to the iPod touch's…