A portal for large corporations (Public and Private) to post their digital development requirements / ideas for development. Web developers could then take up the challenge, generating income for their own projects.
Established corporations typically have a back log of ideas for implementation, but can not get to them due to a lack of staff.
The coalition of the established would allow organisations to post their digital development requirements, essentially allowing developers to work as freelancers for large corporations, earning income, experience and credibility all the while gaining funding for their own project.
These ideas are clearly going to be public, so there is an aspect of open source, but that might actually aid in the development and funding of the ideas, as some would be relevant for several parties, allowing them to spread risk, development costs and provide more users.