Valve has released another nice update to the XboX360 version of Team Fortress 2 and in an interview with Eurogamer they definitely state to keep the updates coming for free for both PC and X360.

Update TF2 X360 March:

• Fixed a medic invuln exploit.
• Fixed grenades going through players or buildings.
• Fixed exploit with rockets causing damage through thin walls.
• Fixed exploit allowing snipers to fire faster than intended.
• Fixed exploit allowing players to teleport with the intelligence.
• Fixed exploit attaching sappers to buildings through walls.
• Fixed spy backstab exploit.
• Fixed spy being able to attack without dropping his disguise.
• Medics no longer heal enemy spies when they're not disguised.
• Tweaked autobalance calculations.
• When an engineer dies in sudden death, his buildings explode.
• Fixed stats sometimes not reporting correctly.
• Added a dialog to indicate when the host shuts down the server.
• Added rumble to TF weapons.
• Fixed ping column sometimes getting hidden in some resolutions.
• Added 10 and 14 player game sizes.
• Prevent hosts selecting game sizes above their bandwidth limits.
• Improved handling of large network packets to eliminate bandwidth spikes.
• Reduced respawn times for smaller games.

Eurogamers question about Orange box on the X360:
Will updates be free, will it all come bundled together, and when is it coming?

Oh, for free, definitely, as much as we can. You know, we don't have full say over that, but we have some say over how that works.

So, for us, for free is the way to go. The gamers play the game, they want to keep playing the game, so we've collected their fifty bucks at the start, and once they're in the park, they can ride any ride they want in the park. So, for us that's been the philosophy.

It may be clear once again that Valve stays the way they always were, releasing updates and new content for free, even on the XboX360 where a lot of publisher charge for every single update.