The Eye-Fi card with its built-in Wi-Fi has kind of revolutionized the transfer of pictures from camera to PC. However, it has always needed a router in between to accomplish this transfer. No more.
You can now use the Eye-Fi Mobile X2 Card [QuickPrice Check] (or download “Direct Mode” from their site to augment the capability of any of your Eye-Fi X2 card) to transfer JPEG images directly from camera to your iPad (iPhone and Android) without the need of a router in between. So, if you shoot RAW+JPEG, the JPEG will be immediately available for viewing/review on your iPad. $80. Sweet!