am very dissapointed by the number of titles available, plus no newspapers or magazines.
Give it time. Amazon took quite a while to build up their offerings for the Kindle. If nothing else, it takes a while for the publishers to format the books for a new device. I have little doubt that the number of books available will increase. Plus you have the option of putting your Kindle books on your iPad.
As to magazines and newspapers, from what I'm seeing those publishers are all opting for their own apps rather than going through the iBookstore. This is probably because having their own app makes it easier for them to provide the format and features they want and to provide subscriptions, something that the iBookstore doesn't appear to be set up for, at least at this time.