Here's the first video I've seen of ingame stuff pop up on youtube:
http://www.youtube.com/watch?v=bpmedTpYtPA

The new buy menu looks exactly the same as the one in CS:S currently to me, maybe I'm missing something.

Edit: New pics taken by someone on the steam forums:
Scoreboard - http://img179.imageshack.us/i/hl22010051116511310.jpg/
Motion Blur - http://img641.imageshack.us/i/hl22010051116510621.jpg/
How dust looks - http://img22.imageshack.us/i/hl22010051116521228.jpg/