Another steady step towards the ideal ebook... more so because it is now on sale in South Korea where I happen to live : ) But I would not sell my Librie off and get a NUUT for a replacement yet. Having used Librie for more than two years, now I know what exactly I expect from the ebook.
1) Despite the improvement of the refresh speed (allegedly up to double), I'm not convinced whether it would be as good as I want.
2) Maybe it's just me but some sort of SDK available for add-on development is a must from the experience with Librie. Andrew Jennings' simplereader on Librie plus SDK provided by Sony opened lots of doors to the support of popular formats which I believe are still ongoing. DRM-protected contents and a simple ASCII file viewer won't be enough.