Looks like this is for the old version. The new version is going through staged preorder now.
If it'll work on the new that'd be enough to make me want one, but kind of rough to do it in the hopes it'll be able to run linux. The official OS sounds like its actual ebook reader software is pretty crap. If I'm going to pay that much for a device like this I really want a nice reading experience, not just note-taking.