If you have an idea of your own that you want to implement, then post it using the "Submit your Idea" button on the Home Page. Or if you like an idea someone else has posted, you can start discussing about the idea in the comments thread of that idea, or as a separate forum topic.
We want you to discuss and have a complete clarity of your vision as a team, and then on July 31st evening, you can present it to the audience in the Kick-Off session of the CERN Webfest and get more interested people in your team. Finally from July 13st evening to August 2nd evening you can hack on your application and then present your prototype to the Judges and the general audience on August 2nd evening.
How do I take part in the Webfest ?