I would love to have full streaming capabilities from websites, like some of the ones you mentioned. I did watch a youtube video of a guy showing the 4 usb drive rooting method. Definitely doable to me, but after I found out about the android sticks, I think it seems silly to go through that. I'd rather update the ROM on a stick that allows it than push a square object through a round hole
Oh well who knows, I haven't even tried the iMito MX1 yet.
Good luck with the iMito MX1. It would be good to hear how it works for you. The NSZ-GT1's hardware has aged and it won't be receiving ICS/Jellybean so it would be nice to see how the newer Android USB drives compare in features and usability (though these technically won't be receiving Google TV support).