A few weeks ago I installed the tracker of Wakoopa. Wakoopa tracks which applications I am using on my Mac (or PC). This results in a public profile page, where you can see which applications I did use. As Wakoopa has categorised each application, you can sort of see what I did / am doing: 'communicate', 'doing some office tasks', 'surf the web', etc. Interestingly also applications are shown of which I was not aware I was using them, such as Security Agent.
My initial interest for this application was naturally the MicroContent view. Each time I start or end the application use can be seen as a MicroContent Item creation. Unfortunately these Items are not available in Wakoopa. The service only stores the aggregated values. So not much MicroContent here.
Based on tags related to applications, the service recommends other apps. There is also a social component: one can join teams and thus influence the applications used by a team, such as MacOSX.
I did not find much use for this service however. In the Mac world there are better usage trackers and application recommenders. But what is more important, I have no idea why I should want to use this.