It simply looks great, this renewed site looks like a real content system, a lot of emphasys is related to community, I think it's important because Linux IS a community, this new behaviour looks fine.
Graphically speaking I've seen there's a lot of movement, information, social network content, AJAX and DHTML a gogo. That's outstanding !
From the application side I'll expect to see some improvements on notifications, I mean if I follow a group and I'd like to see replies to my posts or news it's glad to see them (linkedin or facebook rules !)
Hope it helps if someone (from the web team) reads it
My best wishes