Speaking of the hinge, the act of folding the screen back into tablet mode feels controlled, but it isn't so tightly bound that you'll ever struggle to move the display this way and that.
After speaking with several companies it seems like everyone is in wait-and-see mode right now, they'd like to see what the market penetration of the PSP is first, whether the demand is there for UMD movies, and of course whether Sony is going to add support UMD drives to set-top boxes or the PlayStation 3.
Tiki's Intelligent Speech Mode also includes intelligent mute which can automatically soft-mute the mic when you are not speaking or when conversation is not detected.