I think many of us, like myself, are silently watching with great interest!
I would guess that wifi is to allow access to collections of books for download. Download for purchase from a store is most likely because it's a revenue source. But hopefully one can download local personal content also.
Am interested in battery life, if it can read a lot of formats (and is easy to move content there), and if it has a reasonable expansion card type. I have SD cards already, so that would be nice. But CF is cheaper, isn't it?
And if it can read a variety of formats easily, it could be quite a device. Might even change my mind about a standalone book reader. (So far, the convenience of having ebooks with me all the time on my Treo outweighs the disadvantages of a tiny screen.)
Looking forward to the additional info!