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[1] Frank Magid Associates (http://www.gamedaily.com/articles/news/digital-distribution-accounts-for-just-6-of-game-sales-ndash-magid-/?biz=1)

[2] DFC Intelligence (http://www.gamedaily.com/articles/features/digital-distribution-virtual-item-sales-key-to-online-game-market-growth/70475/?biz=1)

[3] UBS Interactive Entertainment Info Book (February 2009)

[4] Edge Online, “The Age of Steam” (http://www.edge-online.com/magazine/the-age-steam?page=0%2C0)

[5] IGN Entertainment, “Are You Game?” (http://xbox360.ign.com/articles/926/926394p1.html)

[6] In-Stat US Residential Broadband Speeds On the Rise (February 2009)

[7] Frank Magid Associates (http://www.gamedaily.com/articles/news/digital-distribution-accounts-for-just-6-of-game-sales-ndash-magid-/?biz=1)

[8] InStat Mobile Applications Series: US Mobile Gaming 2008-2013 (September 2008)

[9] MobileContentToday, “Report: Mobile Games Revenues Moving Off-Deck”  (http://www.mediabistro.com/mobilecontenttoday/mobile_games/report_mobile_game_revenues_moving_offdeck_76659.asp)