New CS is coming out in early 2012.
News - VALVE ANNOUNCES COUNTER-STRIKE: GLOBAL OFFENSIVE (CS: GO)
So who else is pumped up?
Some of the features: Planned release in Q1 2012
Focus on 5v5 competitive play
Both Defuse (de_) and Hostage (cs_) map types confirmed!
Competitive and Casual modes
Ranked / ladder play for individuals and teams
Gameplay has elements similar to both CS:S and CS 1.6
Classic maps (with both minor and major modifications) include: Dust2, Dust, Aztec, Inferno, Nuke, Train
Molotov grenade: creates area of fire that slows players crossing through it
Decoy grenade: emits fake weapon firing sounds to confuse enemies about your position
Bullets penetrate some walls and objects like CS 1.6
Many changes to weapons, as well as new weapons
Classic gameplay: no ironsights
Beta in September or October (Unconfirmed)