A Human/Pig

I heard last week that scientist have created a cross between a human and a pig in order to create possible organs for transplant.  It was done using stem research to create this thing.

It scares me to think that we are now crossing humans and animals.  I realize what benefits this could hold, but the other risks involving crossing human life with animal life is alarming.  The question is where does it stop?  Are ethics involved?  When people in China and other nations start doing this watch out.