Peripherals manufacturer Fire International has released a handheld version of the NES. The Blaze Pocket Fami can play European, Japanese and American NES carts, all of which you can pick up cheaply on Ebay or your local car boot sale.
"The compact design features a 2.5" TFT screen, d-pad and standard and rapid-fire button configurations. The BLAZE POCKET FAMI also boasts the ability to function as the original console and connect to a TV with the included cable, with the option of connecting 2 NES compatible Joypads into the console," says the press release.
Retro gamers can find more info here.