We recieved several proposals in response to our Call for Hackathons - in fact we recieved too many, as we only have funding for 4 hackathons (500 Euros each - thanks again to ZSI for sponsoring this event.)
So, after a week of voting on the proposals, here are the "winners" (in no particluar order):
Oh, and the deadline for the Call for Papers ends in a bit more than one hour, so hurry up if you still haven't sent in your talks proposals yet...