Nice update from CourseSmart (eTextbook) for iPad

CourseSmart (eTextbook) for iPad now has highlighting, annotating and sharing now. Well done! Box is neat idea but wasn't clear to pinch/zoom to change the size and location of the highlighting.  Love the sharing idea but would be great if it allowed a 'social network' aspect that showed 'friends' highlights/notes/questions.  Keep up the updates!