That's very cool, but something is missing. Mainly, the download. *blatant hint hint*
By the way, this runs in NROM with CHR RAM, yes? If so, I think it might work with the Munchausen Cart, which is great because it means the two projects can be used together.
Anyhoo, take your time with the release of course, it's looking very nice. As for full access to the PPU/APU, what RAM bank is it poking these into? Is the user limited to the 2kb WRAM onboard the NES, or can the 8kb or whatever on the cartridge be used too?