Looks like next weekend is booked for me.
Joystiq.com- Call of Duty 4's Variety Map Pack has emerged triumphantly from the PlayStation 3 certification process and will become available for download next week on the North American PlayStation Network. Infinity Ward's Community Manager, "Fourzerotwo," has updated his blog with the news, confirming the $10 DLC's arrival on April 24th. Unfortunately, European gamers will have to wait an extra week (until May 1st) before gaining access to the four new multiplayer maps.
We recommend you frolic through the maps on the Double XP weekend for North America, which will run from 12:01 AM PDT on Friday, April 25 to 11:59 PM PDT on Sunday, April 27.