WWDC Keynote wrap-up

7) iBooks enhancements. iBooks now uses the same controls as highlighting for bookmarking and notes and as already mentioned, there will be a PDF bookshelf that you can switch from your eBooks bookshelf. Additionally, if you buy from the iBookstore, all of your iOS devices can download the eBook at no extra charge. Also, iBooks will wirelessly sync your place, bookmarks and notes.

8) iAds addition where ads can be easily added to apps. Apple sells and hosts the ads so developers just place the ads in their app to further monetize their app. The selling feature is that the app with the ad being shown will not be highjacked to the web browser but the ad allows you to never leave the app.