Just noticed this and haven't seen anything about it. Looks pretty good IMO.

Well, I don't generally want to bash their approaches to improve the AMO user experience but this is quite hardcore...

Indeed it's usable but there is simply too much information right now.

Ya it looks a lot nicer, just browsing to notice any significant changes, but mostly it is just a new format

Some not-so-favorable discussion here:
http://www.neowin.net/forum/index.php?showtopic=782858

IMHO, I like the new look. Probably I just like blue as a color more than green...