TechCrunch has a nice video showing off Plastic Logic’s new prototype e-reader based on E Ink. Plastic Logic’s main advantage is their plastic backplane (rather than glass) which is lighter and less fragile. They’re also pitching their interface to focus more on business use — in particular the ability to annotate documents (using a touchscreen) and a sidebar that allows them jump to different pages more quickly.
This is just a prototype and so probably an unfair criticism, but I do note that when the demonstrator selects a different document and says “we are able to quickly move from any of the last five documents you’ve been reading” there is an 8.5 second delay before the new document comes up.