
We've seen modded NES systems before, but BenHeck.com forum member "airz" earned some serious geek cred on Thursday by cramming all kinds of goodies into an NES cartridge.
Airz took a foreign-made portable media player and hacked an NES controller to replace the player's buttons, then stuffed the whole assembly into a Super Mario / Duck Hunt combo cartridge. He then cut out an opening for the 2.8-inch LCD screen and the end result is a handheld NES cartridge capable of playing a complete library of NES games using the original buttons, while also serving as an MP3 player, FM radio, picture viewer, audio recorder, and more.
After going through 3 game cases, 2 controllers, and 2 media players to make the mod work, Airz said he's selling his awesome mod to recoup his losses.

Image Credit: forums.benheck.com airz
Links:
[1] http://www.maximumpc.com/user/paul_lilly
[2] http://www.youtube.com/watch?v=vJXPfznWLPU&feature=player_embedded#
[3] http://www.forums.benheck.com/viewtopic.php?f=18&t=33844
[4] http://www.maximumpc.com/article/heavy_metal_modding
[5] http://www.maximumpc.com/article/news/modder_crams_htpc_25yearold_cellphone
[6] http://www.maximumpc.com/article/go_go_gadget_modding
[7] http://www.maximumpc.com/tags/case_mod
[8] http://www.maximumpc.com/tags/modding
[9] http://www.maximumpc.com/tags/nes
[10] http://www.maximumpc.com/tags/nintendo
[11] http://www.maximumpc.com/articles/news
[12] http://www.maximumpc.com/user/login?&commentfragment=comments_top_anchor