The Super Card manufacturers released a new firmware for their Super Card adaptor for the GBA/DS. The new firmware allows you to play homebrew and commercial DS ROMs via the Compact Flash adaptor. Heres the full details:
# Support NDS comercial roms and homebrew, but only support SC special comercial ROMS.
# Support both GBA mode and NDS mode, if you have PASSME or SuperPass, there is a NDS mode menu on up screen, and a SuperCard logo on down screen. Both GBA games and NDS games will list on the menu.
# GBA support like before, only list GBA games without PASSME or SuperPass.
# 1.50 firmware for GBA games should be used with SC software 2.40.
# NDS roms and demo do not need to covert.
# NDS Patch Program is in programming, clear roms can be coverted by user.
So it seems ROMs still need to be patched in order for them to work with the adaptor but unlike the NeoFlash the adaptor is much cheaper at $60 compared to the few hundred $ NeoFlash. You can purchase the Super Card from Linker4U HERE.