It'd be interesting to see a comparison with the other $100 3D printer: http://www.peachyprinter.com/
That also uses photosensitive resin printing, except they use a laser and mirror rather than your cell phone.
That also uses photosensitive resin printing, except they use a laser and mirror rather than your cell phone.
The really cool thing about the Peachy Printer is the mechanism for the laser and such - sophisticated results for just a few parts. And the super cool thing about the OP printer is how simple the mechanism is. I look forward to see which ideas win in the end (or at least for which types of products - some resins are certainly better than others).