A cross between a banana and a pineapple, I would imagine such a fruit would taste a little like an Innocent Smoothie (Or is that Smoothy?!).
There is a friendly warning that the Pinanas may be "sold out" in many Waitroses, but you can still get 50% off "essential Waitrose strawberries".
I really like this advert. It is clean, un-complicated, and features a bright colourful image on a bright (and potentially colourful due to the G20 Summit) day.
Well done Waitrose.