2010 will be a defining year for enterprise Web 2.0. With IBM Lotus and Microsoft attempting to extend dominant positions in collaboration and messaging to social software, a very broad and rich landscape of technology vendors will differentiate to stay relevant in this crowded market. With enterprise social technologies, buyers must now assess vendors pursuing three distinct strategies: commoditization, horizontal and vertical solutions, and integration with adjacent technologies. The trend will drive lower-cost options for many and higher-value purpose-fit options for those that require them.