Despite winning the initial filing, Japanese retailers still sell the R4 and other flash carts, so Nintendo and (presumably) the same 54 companies have again filed suit. This latest filing aims for damages from those reselling the devices. See, Nintendo and the participating companies sent a letter to these resellers back in February requesting that they cease selling the device, but these resellers failed to comply.
Back to the snitching: Nintendo has opened a consumer website to report offenders and retailers hocking the devices. There, folks can fill out a web form with the appropriate information and submit it direct to Nintendo for follow-up. In exchange from Big N, you ask? You don't really expect freebies for doing the right thing, do you? Also, there's nothing.