Waiting around for Command & Conquer 4: Tiberian Twilight? EA has released Command & Conquer: Tiberian Sun for free now to try to satisfy your thirst till it comes out.
From the site:
Set in the early 21st century, Tiberian Sun once again pits the Global Defense Initiative against the Brotherhood of Nod in a struggle for control of the planet. With an epic storyline that unfolds as play progresses, players learn the reasons behind the worldwide outbreak of Tiberium and what happened to the notorious Nod leader Kane, who was presumed dead at the end of the first Command & Conquer.
