There have also been experiments with human/hog hybrids in labs, but they were terminated early. Just because something can be done doesn't mean it should (though obviously crossing parrot species doesn't even begin to come close to that, I'm just making a point in regards to even plants can be hybrids).
HOWEVER
Let's remember that all of us here LOVE PARROTS, and this is a place where we can come to discuss, even if we disagree. Many of us disagree very strongly on key issues like flight vs. clipping, diet, training techniques, the ethics of breeding in general (hybrid or pure), hand raising and weaning issues, the sale of unweaned babies... The list goes on and on. Yet we all manage to be there for each other. Let's keep that in mind as we discuss this issue. I personally do not agree with the hybridization of species, but certain breeders I highly respect not only agree with it but practice it. We each can list the reasons we do or do not agree with any certain view point on any given issue, and as long as we all remember to behave like adults and keep our feelings and our words in check, we all should be able to move forward having gained a deeper understanding of our fellow parrot lover.