Kotaku is reporting that owners of Grand Theft Auto IV will be able to play on Xbox Live free of charge (i.e. with no Gold membership) from February 17th to the 22nd as a way of celebrating the launch of the Lost and Damned downloadable content pack.
Microsoft hasn't made Live free for this long on the Xbox 360 before, so if you only have a Silver account, make sure you take advantage of this charitable gesture - but only if you play GTA IV or the LaD DLC; no free Halo I'm afraid!
[Source: Kotaku]