From Fox News: Clayton Morris and fellow reporters use the Apple iPad, examining the e-book functionality.
Rumor has it that the iBooks e-reader currently does not let readers choose an "unjustified text" format. I hate reading justified text but am assuming that future version of iBooks will fix this. From a post by John Gruber:
iBooks uses full-justified layout for books, with no apparent option to switch to ragged right. It doesn’t do hyphenation, so you wind up with very unsightly word-spacing gaps. No e-reader I’m aware of does justice to proper book typography, but I was hoping for better from Apple. It’s decent web-caliber typography, not print-caliber typography.