CoD: WaW LE owners getting double XP this weekend
According to this Kotaku report, next weekend means double XP for those owning the limited edition.
Both PC and 360 versions get the boost. The event runs from midnight PST on December 5 to December 12.
If you've got the 360 edition, you need to make sure it's fully activated, and you only get the bonus if you're playing in "Officer's Club" playlists, apparently.