<a href="http://www.linker4u.com/affiliatewiz/aw.asp?B=158&A=244&Task=Click" target="_blank" >Linkers 4u.com</a> have posted news of a new Flash Cart for the GBA/Nintendo DS/Gamecube Gameboy player:

heres some details:

Product Features

Plays movies, music, FC games and e-books on your GBA or Nintendo DS
Includes software to convert or create content
Support Real Time Save.
Compatible with NDS, GBA SP, GBA
Game cheat function. Can operate at any time when playing game.


More Description
Super Card SD TO GBA SUPER CARD is a miniature mobile GBA(SP) file Manager and Bakup device. Fore backuping files it uses SD card. It allows you to run a variety of software, Play Game, Watch movie, E-book, Music and Photo albums. All version of Super Card support GBA, GBA SP and NDS.
Super Card is easy to operate. Just use the bundled software to convert GBA games and copy them to SD card. Then, you are ready to enjoy the games.