Microsoft Corporation today announced a partnership with Activision and Infinity Ward to provide prizes for the Call of Duty 4: Modern Warfare LIVE Fire Weekend 2008, a 72-hour play and win sweepstakes beginning on Friday, April 18 at 12:01 a.m. EDT through Sunday, April 20 at 11:59 p.m. EDT. Hourly prizes will be awarded throughout the weekend, including Call of Duty 4: Modern Warfare shirts, Infinity Ward autographed posters and Xbox LIVE point cards. One Grand Prize winner also will receive an Infinity Ward autographed Xbox 360 Elite console and a Limited Edition Call of Duty 4: Modern Warfare faceplate, among other items. Players can register now through April 17, 2008 at 11:59 p.m. EDT. In addition, on Friday, April 18 from 6-9 p.m. EDT, gamers can play with more than a dozen developers from Infinity Ward and then on Saturday night from 9-11 p.m. EDT Jens “Lil Evil” Pulver will join the online action. Check the press release for details.