Wen NEW EP2C15F256 be availible???

I just read about this NEW Ep2c15 and when This device will be availible in digikey and will it be cheaper than EP2C20 F256 ?

It lock like this device is pin compatible with ep2c20f256 http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif