Major Nelson announced XBL sales for both Activision and EA last week. Today is the first day of the Activision sale; the sale ends on January 17th.

Game Add-ons

Call of Duty: World at War
• "Map Pack Bundle" - 1000 MSP
• "Map Pack 1" - 400 MSP
• "Map Pack 2" - 400 MSP
• "Map Pack 3" -400 MSP

Call of Duty 4: Modern Warfare
• "Variety Map Pack" - 400 MSP

Call of Duty 3
• "Call of Duty 3 Valor Map Pack" - 200 MSP
• "Call of Duty 3 Bravo Map Pack" -200 MSP

Call of Duty 2
• "Call of Duty 2: Skirmish Map Pack" - 200 MSP
• "Call of Duty 2: Invasion Map Pack" - 200 MSP

Guitar Hero: Warriors of Rock
• "Guitar Hero: Warriors of Rock 1 Track Pack" - 800 MSP
• "My Chemical Romance Track Pack" - 300 MSP
• "The Rocky Horror Picture Show Track Pack" - 220 MSP
• "Linkin Park Track Pack" - 480 MSP
• "Soundgarden "Telephantasm" Album" - 720 MSP

Guitar Hero 5
• "Rock 1 Track Pack" - 440 MSP
• "Megadeth Track Pack" - 220 MSP
• "Avenged Sevenfold Track Pack" - 220 MSP
• "Disturbed Track Pack" - 220 MSP
• "Fall Out Boy Track Pack" - 220 MSP

DJ Hero 2
• "Hit Makers Mix Pack" - 320 MSP
• "Electro Hits Mix Pack" - 320 MSP

DJ Hero
• "Jay-Z vs. Eminem Mix Pack" - 320 MSP
• "David Guetta Mix Pack 01" -320 MSP

Transformers: War For Cybertron
• "Map and Character Pack #1" - 400 MSP
• "Map and Character Pack #2" - 400 MSP

XBLA Games

• Assault Heroes 2 - 400 MSP
• Assault Heroes - 200 MSP
• Carcassonne -400 MSP
• Arkadian Warriors - 400 MSP
• Golf: Tee It Up! -400 MSP

Xbox Originals

• Crash Bandicoot: Wrath of Cortex - 600 MSP
• The Legend of Spyro: A New Beginning -600 MSP

Unfortunately, although everything on this list is listed on the Xbox dashboard, the discounted prices of some of these items are not reflected in the marketplace yet. I would advise checking back later if the price is not yet discounted.

Here's a link to the Games Marketplace for those of you who can't wait to start downloading.