Just to clarify, as I am receiving a number of messages confused of what I said in my Iron Man 2 post. Xbox Live will discontinue it's live online service for the ORIGINAL XBOX console and games on April 15, 2010. This no way affects the Xbox 360 Live service...

What it does affect is people who are still playing live games on the original Xbox, for example Halo 2 and playing original version 1 Xbox live games playable on the Xbox 360. Read the official post here. This will be an end of an era for Halo 2 fans as it has always been to this day, still very popular and top of the Xbox Live Chart for original games for the last five years. Bungie have said they will do big farewell and will announce details soon. As for us on the Xbox 360, this will finally enable Xbox Live to increase our friends list beyond 100. The reason why it couldn't was Halo 2 had the list cap hard wired onto the original console. So maybe we will get  a 5000 cap like Facebook then.

[source gamerscoreblog]