Something more from the
UK Faq:
3. When will Reader be available to buy?
Sony Reader will be available to buy in the UK from the Sony Style online store; Waterstones.com; over 200 High Street Waterstone’s stores and other selected electronic retailers from early September 2008, but you can reserve your own Reader now.
4. Can I pre-order a Reader?
Yes, you can reserve your own Reader from the Sony Style online store. As soon as the stock comes in we’ll send you your Reader, along with a CD-ROM featuring 100 classic eBooks to help you start your collection and a £5 voucher off Reader accessories. The product can also be pre-ordered at waterstones.com
15. What type of memory cards can I use in Reader? What sizes of memory cards are supported?
Reader supports a Memory Stick Duo™ of up to 16 GB, that’s roughly around 13 000 typical books. It also supports SD memory cards . It is important to note that Reader does not accept the “full sized” type of memory sticks or adapters.
[comment: I didn't even know 16 GB Memory Sticks exist. Who on earth would want to carry 16 GB worth of e-books around??? 
]