The Television Critics Association fall press tour is under way, and here come the tidbits: HBO has announced that the fourth season of Curb Your Enthusiasm will premiere on Sept. 25, and will be paired with Extras, the new comedy from The Office star and creator Ricky Gervais. Also, it was confirmed that The Sopranos' long, long-awaited new season will finally arrive in March 2006, and that Entourage has been renewed for a third season.