As far as I know If you log into Xbox Live (have setup the live account) and then place the game in the system it will tell you if there is an update.
That was how I did it for Halo2...
On Tue, 20 Jun 2006 20:33:25 +0000 (UTC), "Paul C." <Paul_C_NB.DeleteThis@yahoo.canospam> wrote:
>Steve Bailey <stevea_bailey.DeleteThis@yahoo.co.uk> wrote in
>news:WtidnZ8zFvBj1AXZnZ2dnUVZ8sidnZ2d@bt.com:
>
>> Hi Xbox gamers
>>
>> Do any of you know if the Oblivion patch is available and if so, how to
>> apply it? I have gone through XBOX live and into the downloads section
>> of the game but I can't see any mention of service packs
>>
>> Cheers, Steve
>>
>
>Hmmm well when I got it a screen popped up automatically telling me that
>there was an update for the game... >> Stay informed about: Xbox 360 Patch