Gartner’s Magic Quadrant for Application Infrastructure for Systematic Application Integration Projects (October 2010) places Microsoft in the leader’s quadrant for integration, with BizTalk Server and the global integration platform, as the company with a clear lead in the ability to execute dimension. 
Gartner’s report can be found here with all the details. Check the Microsoft section to learn about the strengths and cautions to have. Some interesting details are: “the least-expensive perpetual license of commercial offerings that Gartner analyzed”, “BizTalk Server installed base of more than 10,000 customers — two-thirds are estimated to be BizTalk Server 2006 Enterprise Edition”, “Microsoft garnered 13 % of the ESB suite market software revenue” or the ever important skills question: “results in the availability of skills, services and add-ins”.
