Samsung introduces with the Samsung SyncMaster2263DX a 22 inch LCD Monitor with an additional 7 inch side display.

The small 7 inch display is thought to improve multi-tasking productivity by extending the desktop to allow secondary applications and programs, such as an instant messenger, movie/music player, web browser, photos, or widgets, to run without distracting from the main work display. The USB (UbiSync) connection of the 7" screen enables easy setup and the articulating arm allows convenient positioning.
Digital Trends has published a first look of the Samsung SyncMaster 2263DX Dual Display.
The Samsung SyncMaster 2263DX has a price of $549.99.
See also the Samsung site.