Kotaku reports that there's a new patch on Live for The Orange Box that addresses some issues in team fortress 2:
• Reduced network bandwidth usage in multiplayer.
• Improved overall game performance.
• Arranged search results to favor preferred host conditions.
• Improved searching for ranked games.
• Addressed a possible false report of too little storage space on larger hard drives.
I haven't experienced a lot of problems with Team Fortress 2 but I haven't put a lot of time into it, really. I just wrapped up Portal last week and now I'm slogging my way through Half-Life 2. Just how long am I gonna have to drive this hoverboat, anyway?