I like the concept. White layout with bigger, more readable blocks and less wasted space above the fold, but some of the fun they had with the footer and javascript on the page should probably be dropped to make the page load a bit smoother and yeah mobile has definitely not been considered or tested against. I also wonder if these pages are completely dynamic as they seem to load very slowly even in a logged out state.

Side by side speed comparison:

http://farm3.staticflickr.com/2859/9133368868_54f4a8cabb_h.j...

http://farm4.staticflickr.com/3700/9131157097_923af39b1b_h.j...

Iphone rendering:

http://farm8.staticflickr.com/7402/9133398088_4cd5d18661_b.j...

http://farm8.staticflickr.com/7288/9131186519_b00acc38a0_b.j...