I didn't research their entire site, but even if they do not host any ROM directly they sure link to a lot of sites that do host ROMs. Besides, you can't get the SMA4 levels from codes like with an Action Replay. The codes are on the cards. So you'd have to hack the ROM to add the levels from the cards. That would mean that anyone without said cards would be pirating the card codes.
I am still very upset about Nintendo canceling series 3 and 4 e-reader cards. I'm hoping that with the DSi they will add a GBA download channel and have the e-reader levels on it.