Want to use your Game Boy for fun?

Here's something on found on one of the forums. Make sure you read. I don't own a Game Boy and don't think this will make me buy one. But it is another toy.
http://www.competitionplus.com/05_20_2004/i_card.html
And here is a better price
http://www.upracing.com/index.php?page=shop/normal_product&category_id=&product_id=9601&ps_session=b87ae6c7fffb05c691c276bb14aa6896
Read and have fun
http://img.photobucket.com/albums/v425/kustomkid54/1998PontiacGrandPrixGTP002.jpg