What evidence do you have that he ever got homebrew running on it in any fashion other than DSiWareHax? And are you sure he wasn't involved with DSiWareHax?He never released anything about the DSi, did he?Doesn't count, he's not going to share any hack he can find.
Um, what? I'm pretty sure if he finds a way to run homebrew on the 3DS, he will release it. He probably won't release anything he finds that will lead to piracy, but that is a whole other matter.