To answer the questions:
This is not a ready-to-run application. It is a dependency of the FM Radio app and now also of Qt Mobile. Nokia put the package into the update repository, that's why it all of a sudden appeared together with PR 1.3.
It's a D-Bus service that programs can use to enable the FM tuner chip in the N900.

So what s a D bus service? Do i have to create a Qt script to make it work? Sorry but i am not so into programming, thus the questions...