AUO unveiled a new 4.3" AMOLED panel offering 257ppi. The company actually said they "launched" the new product, but it seems that they aren't mass producing it yet (this will probably happen in early 2012). But the company is reportedly shipping samples already.
The company has also demonstrated a 6" transparent OLED display (with a transparency rate of over 35%), and a 4" Touch AMOLED display that features 30% less energy consumption compared to other AMOLED. We assume that this display includes an in-cell touch panel - similar to Samsung's Super AMOLED displays. AUO unveiled their AMOLED in-cell touch technology back in June 2010.