RIM is getting ready to launch their new BlackBerry 10 operation system and the first devices that use it. A new leaked slide suggests that the new N-Series (with the QWERTY keyboard) will feature a square 720x720 2.8" AMOLED display. The pixel density is high at 330 ppi (it's likely that it uses Pentile tech). CMI has shown 326ppi OLEDs as well, but they will not have the capacity needed for RIM).
Apparently the N-series will be released in Q1 2013. Although this is a rather small AMOLED displays, it'll be great to finally see the first Blackberry with an OLED. Note that the slide says that future N-Series generation may revery back to LCD panels.