Forgot to say that the site is up and running :P
There you can find a lot of information, including a pdf with the product specifications (link
Formats: Pdf, xhtml, txt, mp3
And theres a stylus in the images.
"Which formats do you support?
In order to stimulate the momentum in electronic reading, iRex Technologies will support as many formats as possible in as open an environment as possible, respecting the rights of owners of content and IP."
"Although the business focus of iRex Technologies is Business-to-Business solutions, we will also make our product available for individuals, who can order via our iRex Technologies web retail. (April 2006)"