Received my 4GB nano clone from ellieshang yesterday. It appears it's the real deal. Formatted it twice and have downloaded nine movies to it so far. Haven't watched all of them yet, but each one will load and start playing without Format Error showing up on the screen.
Other than the color (white), it's identical in terms of appearance to the hacked one (black) I got from keistore.
Still wish it had 35mm jack, but I knew that going in.
Will definitely be leaving good feedback for this one!