Cybook Opus: Lightest eReader?

I read with great anticipation the article entitled "Cybook Opus Wins featherweight E-Reader Crown" at ComputerWorld. Having just reviewed one of the lightest eReaders, I was curious to see just how smaller it could be.

Bookeen, a company whose name just keeps popping up manufactures the Opus. It's billed as 6.0" x 4.2" x 0.4" and weighs 5.3 ounces. Let's see how that stacks up:

eReader Size Comparison
	PB360	Opus	Sony
Width	4.6"	4.2”	4.25"
Height	5.5"	6.0”	6.25"
Depth	0.39"	0.40”	0.41"
Weight	5.3oz	5.3oz	7.76oz
Surface Area	25.3”	25.2”	26.6”
List Price	$239.99	$250.00	$199.99

I'm not quite ready to declare it the King of the Small eReaders yet - in part because I haven't reviewed one, but also due to it's 4 shades of gray e-Ink screen. For reading, it shouldn't make a large difference - but it's far from ideal for images.