First of all: Great Ideas!
Here are my thoughts: It will not happen that you can hook up any device via Firewire to the iPod... I don't think they'll be able to get the software together to make the iPod work with any CD writer... and I don't think it has enough power to do so. Same for the Visualizer... it would be cool, but it's useless and the iPod certainly isn't powerful enough to do stuff like that.
A mic would me great as well, but I don't see apple making a firewire microphone. (BTW: a mic only records one channel, so there wouldn't be L and R)
iPhone... naa, I don't think so.
iCam.. probably not, again I think the iPod's not powerful enough to do stuff like that. It has only one 'lil chip for playing MP3s... I even doubt it could do AAC, though I hope that would still be possible.
I would love the option to add notes with a virtual keyboard, though it would be much work... but that's not as easy as Apple likes things to be

The picture viewer will most likely not come either. Apple doesn't want the iPod to be a PDA, and you can't officially view any files on the iPod right now. Remeber, to view text, you export it so it looks like a contact to the iPod.
The only thing I really think that could be part of a future update would be the adding of picture thumbs for contacts... but then, again, how does Apple want to do this, vCards don't support pictures as far as I know, do they?
But oh well, we can still dream about all this stuff. Good job on those pictures again! It's always fun looking at stuff like this...