Well, not just fooie... suggest it to Apple. 🙂
For e-books to really be a viable platform for someone serious about books, that capability would be needed. Otherwise, it is simply a gimmick for people who pleasure-read paperbacks and ditch them. If I'm seriously going to start buying books in the 'e' format, I need to be able to use them on all my devices while I work... which means at least computer and iPad.
I have books on my bookshelf that I've owned across several computing platforms coming and going. I LOVE the idea of having all my books with me, and not having to box and move them, and to be able to search, etc. But, books aren't a 'throw away' item to me, so another thing Apple really needs to consider is how to ensure books I buy are still going to be useable to me after the iPad and OSX have moved on as well. The solution to iTMS was to end up at unlocked AAC and MP3.... and I hope that is eventually the direction stuff like books will move as well (or at least some way of being able to use them on multiple platforms). This was important to me with $1 songs... it is even WAY more important to me with a $40 book... which I might still be likely to want to use 20 years from now. This is something all these 'e-book' companies really need to think through.