http://www.pcworld.com/article/218363/apple_rejects_sony_reader_app_says_report.html
"Apple reportedly told Sony, among other app developers, that Apple would
 no longer allow downloadable content to be sold within an iOS app 
unless it used Apple's in-app payment system.   Apple also reportedly 
said the developers could no longer sell content outside an app and then
 allow users to download it to an iOS device later."
Wondering how this impacts the logos app?  I'm almost ready to buy an iPad and having access on my iPhone and future iPad was a big reason for me to upgrade to logos 4.