Damn. Nintendo needs to step up their own support for both VC services, but they also need to get more 3rd parties involved. Like ASAP. Barely any 3rd parties support VC now compared to Wii's VC days.
This is ridiculous. We're still waiting for N64 support to arrive on Wii U, Wii U's VC is missing a bunch of classic consoles Wii's VC supported, and 3DS' VC doesn't support a bunch of classic consoles/portables you'd think would be a no-brainer like GBA, VB, SNES, TG-16, Master System, Mega Drive, Neo Geo Pocket, Wonder Swan, etc.
I'm going to be super pissed if Nintendo skimps on emulating the N64's Rumble and Controller Pak accessories once N64 does actually hit Wii U's VC service. I can't imagine them not including support for the N64's Expansion Pak, though. After all, a few games were released on Wii's VC that required it. Majora's Mask being one of them.