Well... If it were a chainsaw, then there would be no question whatsoever.
As it is, it's the team who has the soldering iron, who wrote the code, who designed and built the prototype, who figured out production against the other guy who is known for having occasionally hidden ties to companies he talks about on his blog, who has thus doubtful journalistic standards and who posted a couple pictures, promoted the device and published stories about how it would change the world, painting himself as an internet visionary turned hardware mogul.
I stay with the guy with the soldering iron on this one.
Interestingly, I also can't see US$ 299 as such a ludicrous price. I doubt an e-paper display is much less expensive than a LCD twice its size and there are devices in this space that cost $299.