One here
I had one issue preordered on my Amazon acc for weeks, but when i checked expected delivery time i said - "no way man" and canceled it. Just two or three days later it appeared in the Store - instant buy. So i was quite lucky. As you have already noticed, i am not a native speaker and this is an awesome way how to improve my "Czenglish". I dont regret i canceled my book preorder, the iBook version is now better in every important aspect with all the built-in dictionary, highlighting, wiki and yes, portability.
Oh boy, i sound like iSteve...
So i am sorry i am wasting your time, cos nobody is really interested... anyway, another iBook_version++ here...