Yes, I still have (and love) my EB1150.
So far I didn't find my code, and I'm afraid I won't be able to get it back
Anyway, I remember reading the protocol used between the device and the server. I think I've used some kind of software to "listen to" the network traffic while the device tried to access ebookwise account on the internet (I may have used tcpdump)
The protocol for book request/download was quite simple. I don't remember if I "injected" the html file as a response to the first server access or when the device requested a book.
I'll try to check on an old hard drive I dumped long time ago.
Hope this helps :P