I've dumped Atomiswave carts, I think Bill D has as well, you just remove the flash chips and dump them like any surface mount roms. They're just stock name brand chips on all the carts I've opened up. The dumper system brizzo made for them is so you don't have to go through that process (like what was done with Naomi carts and rtw's setup). More importantly it was made because there are proto Atomiswave carts with owners who are scared of rom removal.
There's stuff that goes on behind the scenes, I've known about this 68705 stuff forever and I've mentioned the 68705 dumper before on the DU list and here I'm sure. As long as Japan is in the picture there's going to be stuff that goes on behind the scenes. I just got an email an hour ago that would blow your mind but because of Japan the benefits are going to trickle.