I'm one of the volunteers in Appsterdam and I can tell you we will do all of it, and more ;) A quick list:

- Creation of a community with meetings and drinks.

- Weekly lectures about technology that will also give speaker training.

- Provide legal and local information to people that will move here, like immigration policies and the like.

- Arranging of venues to work in and be around with other developer: we have the Appsterdam HQ; Igluu and Vodafone will offer a work space for a good price and with facilities like a lab with smartphones for testing; we will locate developer friendly cafes with free wifi.

- Family get togethers in the weekends, so our partners/spouses/children can create a network too.

- The university is interested in creating a course where developers are professors like in (if I'm correct) Berkeley.

- The government is interested in giving money for tech projects.

- At the party Mike announced that there will also be a fund for startups (called Appsterfund).

Maybe I'm forgetting something. Soon the video of the keynote will be online.

Edit: formatting