Samsung has published their OLED roadmap for the coming years. In 2008 they want to have 3.5 to 7 inch displays - for ultra-mobile PCs or PDAs. In 2009 they will have 14"-21" panels, to be used in laptops and desktop monitors. In 2010 they expect to commercialize 40"/42", Full HD OLED TVs.
Samsung also expects to have flexible displays out soon - they cannot commit to a date, but they say 2012 at the latest