Update (05/19): Hey, my idea made it into the top 5! These are the two final projects:

• indawo.de, a platform that helps event organizers to find suitable locations – for both corporate and private events such as weddings.
• lockerlernen.de, a community for tutorial videos targeted at pupils, where I took care of the video portion.

In the final meeting, indawo.de was chosen as the project that will be incorporated with a 60:40 vote, and everybody that attended is now a shareholder. lockerlernen.de was not short of praise and the team members are looking to incorporate it as well.
Programmers and graphic designers were incredibly scarce, so the implementations are at a very early demo stage. Most attendees are now back at their day jobs, but each project has a committed core group that will hopefully drive these projects forward in the nexts months.

I learnt a lot about crowdsourcing today. While I often felt that the sheer number people was slowing things down considerably and there were many disagreements, we ended up with two ideas that I can see surviving. Thanks a to the organizers Cem and Jason for pulling this off!

Read more feedback here, and Flickr evidence here!