CBS Corp. has invested in virtual world content developing firm Electric Sheep Co. The deal calls for CBS to contribute to Electric Sheep’s latest round of funding, which is for $7 million, Earth Times reports. Electric Sheep creates 3D virtual world content and solutions, as well as software products, interactive design and integration and production solutions. Electric Sheep’s clients include MTV Networks, Time Warner’s AOL and Major League Baseball.Corporate interest in tapping virtual worlds to market brands and products have surged in recent months as marketers test new technologies to reach consumers who now split their leisure TV-viewing time with the Internet. Electric Sheep, consultants and designers of properties in 3-dimensional virtual worlds such as Linden Lab’s Second Life, have accumulated a portfolio of Fortune 500 clients that include Time Warner Inc.’s AOL, General Electric’s NBC and Viacom Inc..The company also consults for Linden Lab, creator of the virtual world Second Life.Reuters/Beautiful Mind Co.