My Cybook arrived today too. I ordered it for £150 on 5 September, sent a gentle email reminder to the WH Smith customer services team on 16 September when it was showing as in-stock, and received it today. (I suspect my email had no effect though.) It's now charged up and working.
A taster for Bill Clinton's My Life is pre-loaded: what a fantastic ego he has!
I posted a 2 min "first impressions" video here for anyone who might find it interesting:
blog link
I am impressed that WH Smith stood by their obvious error in setting the initial price