Thought I'd mention this--when I was in the Staples the other day, they had several different cases for the new Amazon Kindle Touch. Out of curiosity, I tried these on my Sony 650 and it fit in them almost perfectly. I didn't buy one, and don't remember who the manufacturers of the various cases were (I think mEdge was one). I wouldn't recommend ordering one sight unseen, but if you're looking for a case for your 650, you might try some of the new Kindle Touch cases.
dordale