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Three products in the social-software toolbox -- blogs, wikis and RSS -- have begun to gain traction inside companies. Blogs are probably the best known, thanks in part to their popularity on the Web and partly because of the handful of executives who use blogs to address customers and employees and to muse about industry trends. Lately, blogs are showing up inside companies -- including Procter & Gamble Co., Northwestern Mutual Life Insurance Co. and ad agency TBWA Worldwide, among others -- as a way for rank-and-file employees to discuss important industry trends, to bring project team members up to speed, or for employees to vent about changes within the company. Wikis aren't as familiar as blogs, but they may be even better suited for business use. They're versatile tools for doing almost any sort of collaboration, from project management to building vast repositories of knowledge. (That's what the best-known public wiki, Wikipedia, has done.) At Walt Disney Co.'s Pixar studio, for instance, wiki technology is being used to help coordinate new computerized animation tools for the studio's planned 2008 release of a film called "WALL-E." Finally, RSS (for Really Simple Syndication) knits together all the material created on blogs and in wikis and delivers it in easy-to-find fashion. RSS lets employees keep up to date on the latest blog post or change in the project-team wiki. It also can alert users to changes in business-critical information like an entry in a spreadsheet or even the computerized output from production equipment, such as error messages from semiconductor machinery. Other Web 2.0 te