Nope it is only available in 27 countries and SL is not one of them :(
However If you can manage to enter a different billing adress (for example I entered Punjab India) you'll be able to play o xbox live. However you cannot buy goods via the Xbox when you do this. However if you can buy your Xbox addons and passes from places abroad you'll be able to redeem the codes in Sri Lanka ob your Xbox.
Sigh by the time SL gets live...
Anyway hope this helps :)
in the marketplace
Xbox Live Marketplace was created in 2005-11.
In The Xbox Live Marketplace.
Xbox Live Marketplace!
Yes. However, if you console has been banned from Xbox LIVE, you will not be able to access the Marketplace to download 'Splosion Man.
If its any concelation im getting the same message, cant play online at all.
Xbox marketplace
The Xbox 360 marketplace is a place to buy games, trailers, items for your avatar and profile.
Elder Scrolls: Oblivion doesn't have any online multiplayer, so you don't connect to xbox live through the game. However, there is downloadable content on the xbox live marketplace, which you access through the Xbox Dashboard.
Xbox 360: Xbox Live Marketplace Playstation 3: Playstation Network Marketplace PC: Steam Marketplace
download them from the marketplace on xbox live
Marketplace.