Hi Norbert,
As well as dae files we also support 3D Max too (.3ds)
At the moment I don't believe we have any support for animated symbols, but I will check if there is anything in the pipeline. As you say the Bristol aircraft in the samples is a static model which I created using Blender.
We'd be interested in hearing more about your use-case for animated symbols. I wonder if our Game Engine API developments would be of interest to you.