Hi Andy
I advise you to look into this forum for other people's experience about purchasing and delivery dates.
It looks as if they just give a buyers information near the day of sending the goods and this can take days or weeks depending of availability of Cybook’s to be send.
Also the Cybook looks to me not available yet, as you can see from Bookeens website:
http://www.bookeen.com/shop/ebook-shop.aspx, but are expected to be available somewhere in May.
Hope you get yours as soon as possible.
Best regards,