In an effort to promote their online features, Microsoft are allowing all of their members in the EU, on the Silver package, to experience everything they are missing by offering the Gold package for free. From November 25th to November 30th the service will be free-of-charge, meaning those who do not pay for their Xbox Live membership will be able to play online, use Twitter and Facebook, listen to music via Last.FM and join in the 1 v 100 gameshow as well as access to Sky Player, Halo Waypoint and Netflix.
Silver subscribers would normally only get access to the Xbox Live Marketplace.
With a massive UK advertising campaign currently underway, this looks like a very wise move from Microsoft. With all of the features available to Gold members, I can see a lot of people taking the leap and upgrading their subscription.