This is big news. Collabnet are the guys behind the excellent subversion source control system. The (very pricy) CollabNet collaboration platform has always seemed a tough sell to me. Moving to a salesforce.com-style business model could be a big win for them.
Yet another collaboration tool that has a subscription model (like gotomeeting, like basecamp, like copilot). This trend is being driven by the flattening of the software development world: when your developers are on another continent, it takes a lot of infrastructure to communicate with them. The bleeding edge of software as a service is turning out to be collaboration tools. This makes sense, since phone bills have habituated people to the concept of paying for communication by the month.
Via Oreilly radar.