Android talk, Notification Framework, OTTO, ABS, Google GSON and Fragments
Look into the Jelly Beans Notification Framework, and some uber useful facilities and libraries
http://romansky.github.com/androidtalk0812/talk.html (use keyboard arrows to navigate slides)
More links are in the presentation.
The Android application source code is under /code There's also an APK if you want to install the demo's and play aorund with them.