Galaxy Note II firmware update brings split-screen
Multi-View enhances the multitasking capabilities of the Galaxy Note II, allowing you to run two apps on the screen simultaneously. Mind you, not all Android apps are supported, but unlike the Galaxy Note 10.1, where only Samsung apps could be brought up to the screen, Multi-Window supports Google apps as well (Gmail, YouTube, Chrome and Talk).
The update version is XXALIJ1 and comes with a new baseband, as well as an update to Google Chrome.
If you own a Samsung Galaxy Note II, you can check for the new firmware from About device -> Software update. While waiting to download, you can see Multi-Window in action on the official Samsung Galaxy Note II ad below (around the 2 minute mark).