Here is the planning of the event, as you will notice, we will mainly focus on hacking:

Friday 24th:
6pm: doors open
7:30pm: Welcome speech
8pm: talk about APIs by 3Scale and Viadeo (2*8min talks)
8:20pm: Featured APIs presentations (7*3min talks)
9pm: Pizzas & teams gather and brainstorm
(hacking (all night long is possible))

Saturday 25th:
9am: breakfast
1pm: lunch (picnic style)
6pm: hacking stops, everyone gathers, demo time (3min demos, fast pace, teams get ready in line)
7:30pm: jury gives its result.
official end of the event, doors remain open until 10pm