There is a world of potential volunteers outside the United States, and in some cases the only incentive they need to pitch in is the freedom to adapt a product or service to their own needs.
How this applies to wiki collaboration:
At Atlassian, we have offices in Sydney, San Francisco, and Kuala Lumpur, and one wiki for everyone. This makes it easier to put information in one place where everyone has access and the ability to offer input. For a global company, we’re all in close touch and able to communicate, make decisions, and work across these great distances very quickly. The general idea here is that no matter where in the world you’re based, the wiki doesn’t just have to be used by people in close proximity to each other – it can bring those who are far away much closer together, to everyone’s benefit.
For more on how to effectively introduce a wiki in your organization, visit Wikipatterns.com.