Bushing is doing more work on trying to hack the DSi, heres a tidbit:
As we probe deeper into the DSi, we come across some neat stuff. Scanlime got a new FPGA board from Sparkfun, which gives him more GPIOs and the ability to run them at the 1.8v necessary to properly talk to the RAM.
Scanlime's debugging setup with new FPGA
Sorting through the data we get from this setup is still a considerable challenge. Here’s a trace taken while the video camera is actually capturing video: