I had seriously considered the Mighty Bright Pocketflex, which looked really perfect for what I wanted, and I had it in the shopping cart, but I read on the reviews that the clip didn't open very far and wasn't good for anything other than a naked ereader. But it was able to wind the neck around the base. I often just jam my reader in my jeans or coat pocket, and I didn't want something with a floppy neck to worry about.
I think the dark corners are amplified somewhat by the photograph. I hardly notice them when looking at it directly. Maybe because I have a protective film on the screen. Still, it would definitely not be good for a large sized ereader. I'll post more thoughts after I spend some real time with it. Though, if it's only available in Asia, it probably isn't so important