My team is soon to release a new website. Essentially, the site is a collaborative game that relies on the community to be sustained.
What are some techniques/ideas for gathering the initial audience to a startup that requires a community to be sustained? For example, StackOverflow/Wikipedia require the community for their site to succeed. How do sites such as these get their initial audience in order for the site to pick up steam?
And, to increase the challenge, we require the initial audience to be a fairly large group of people. We can't afford to have users slowly come to the site over the course of days.
Anyway, all ideas are appreciated.