Hello,
in addition to the invitation, we have the opportunity of presenting ourselves at the Berlin Foundation day, for a rather small fee of 100 €.
I definitely propose to take that offer, but I can't make it. So, same proposal, Thorsten, Björn and Michael could check whether they can and want to join and then the board can (hopefully 
approve it. I consider it important to be there.
The deadline for registering a booth is September 17th, but there's only limited space, so - the early bird catches the worm. 
Florian