iOs storyboard

http://kurrytran.blogspot.com/2011/10/ios-5-storyboard-and.html

http://maniacdev.com/ios-5-sdk-tutorial-and-guide/xcode-4-storyboard/

iOs Sample Code

reader app :
http://www.codeproject.com/KB/iPhone/iPhoneDevReader.aspx
sample code : http://developer.apple.com/library/ios/navigation/#section=Resource%20Types&topic=Sample%20Code
sencha :
http://www.netmagazine.com/tutorials/build-ipad-app-sencha-touch
pdfkit : http://pspdfkit.com/purchase.html

Magazine Apps ;
http://ios-blog.co.uk/iphone-development-tutorials/how-to-make-a-magazine-app-in-ios-part-i/