Which is generally for the best, since your average user has no business nosing around in /etc or /lib. In fact, I'd say this is wrong since you do have the Bash shell. It's not a GUI, but if you need a GUI to browse the greater filesystem you probably shouldn't be messing with it.

Which is a fast dying feature in the face of things like Skype.

What do you mean by this? I think the person you were replying to meant that WP7 devices can't be used like a disk when plugged into the PC, and I suspect you mean host mode.

Could totally be added.

Could happen. Probably won't until MeeGo comes out.

I don't see why this doesn't already exist.

Nonsense. Probably not by Nokia, but still nonsense.

Indeed, and you are forced to wait for them to catch up. But then the greater problem of WP7 being as restrictive as iOS (if not moreso) comes into view, and it just ensures that you can't really do what you want.