The iBookstore is now live on the App Store (free) and comes with Winnie the Pooh and the ability to sample of any book in the store before buying.  US-only and iPad-only for now, global editions are expected in the near future.  

It isn’t certain if Apple will build versions of the iBookstore for Mac and iPhone/iPod touch like Amazon has built with the Kindle but it would certainly be welcome.

You can also drag free ePub books manually into iTunes as demoed here.

About the Author

Seth Weintraub's favorite gear