I've got no idea whether its real, whether it would have GBA support or just integrated browser support, or whatever else. But I do know this ... if you think the DS-X, EZ-V, SCDS1, R4, and M3DSsimp. are the only generation of Slot1 cards we're gonna see, then u crazy.
The DS has AT LEAST 2 good years left in it, and then probably one lame year, so there's lots of time left to turn out better/faster/fuller featured Slot1 cards. If these were the last products these companies were going to make, they'd all be going out of business by the end of 2007 for lack of sales.
Therefore, one way or another, of course its real.