Correct. And history of Nintendo suggests they will share RAM with the main memory pool and GPU working together. I would bank on 2GB of RAM total. NIntendo has shared RAM on all of their consoles (although I believe the 3DS has some VRAM allocated)
Not sure, the audio DSP will most probably use shared RAM but that's not the issue. There is big advantage with audio DPS, because you have all the resources for the audio there, developers don't have to worry about the balance and they can start making complete audio assets much quicker in the project as they know the capabilities and having in mind that the rest of the game graphically or processually won't impact the audio's budget. it's the specialization and you can have groups of teams worrying about different stuff, it's better because the programmers don't need to communicate as much as to make everyone sure it's on same page, for example a big engine change comes and they would have to report to every other group which messes up the productivity if you throw work away in the middle.
With the audio out of the way, it would be possible to suck out even more resources.
I expect WiiU software pretty clean and organized, it's what nintendo does well, with the system hardware and software layer stable it's going to blow developers away.





