SemiAccurate has a decent article regarding AMD's upcoming Llano chip - he puts his detective hat on and does some digging.
Llano was meant to be the first "fusion" chip from AMD, beating the TMSC fabbed Ontario/Zacate chips by a a decent mile, things progressed well for Ontario and Zacate, but their bigger brother Llano was left out in the cold. Details on this have been scarce.
Most people blamed AMD or Globalfoundaries, or both. The article explains the delays and peels back the curtain on the upcoming Llano chip, it's a good read if you're a fan of tech.