This forum post has details of the latest update to the CS:S beta, those that are playing it, hows it coming along?

Are you all bored of playing de_dust already?

COUNTER-STRIKE: SOURCE BETA CHANGES / ADDITIONS:
Improved consistency of hitboxes between the server and client
Fixed glows showing through map geometry
Fixed grenades getting stuck in props
Fixed rendering errors with DX8 and anti-aliasing
Fixed playerlist in-game UI: will now properly display players
Fixed skywalking exploit on De_Dust
Fixed alt-tab video corruption bugs
Fixed player hovering over ground on round restart
Fixed reload animation bugs on AWP and Scout
Updated scoreboard to display 32+ player games properly
Updated weapon sounds
Updated weapon model textures
Updated player hand texture
Reduced effectiveness of flashbangs behind the player
Added Friends list to in-game UI
Added sv_password for servers