Recently, colleague Dave West and I published some research showing how Agile has gone mainstream in both the tech industry and IT departments. Here's another sign of the mainstreaming of Agile: Collabnet's acquisition of Danube. If you follow the market for developer tools, you've seen milder indicators of this trend already. For example, last year, Atlassian acquired Greenhopper as a plug-in for JIRA. Other tools vendors, such as Compuware, have added Agile configurations to their existing products. Collabnet's acquisition of Danube is a bigger step. Danube's core product, ScrumWorks, is a lot more than just a configuration or a plug-in....