People interested in this device should definitely check out Nathan from theebookreader.com's videos:
This is a general review and shows the four built-in apps.
This is a series of videos looking at individual 3rd party apps such as Kindle, Kobo, Feedly and Comixology
Definitely looks interesting but lot of the apps you aren't getting the absolute best experience because they're simply not written with an eInk display in mind. So I'm still thinking about the balance between the compromises on that front and the flexibility of having access to lots of apps.
Still very tempted though.