Unlike just a few years ago, there are no shortage of Web 2.0 applications for the Enterprise. There are widget frameworks, platforms, realtime collaboration, blogging tools, social networks and more.
There is one major common denominator that I see between the current Enterprise 2.0 offerings, and that is the obsession with the desktop webbrowser as the major source of interaction with the application.
The truth is that the most successful Enterprise 2.0 applications will focus heavily on mobile and will take in to consideration the considerable different use cases related to how different functions use mobile devices.