Comment Solutions Database (Score 4, Interesting) 239
For individuals or for business, the site could offer alternatives and/or solutions to common problems. It can also promote open standards for others to follow.
e.g. replacement Office suite = Libre Office, ProTools = Audacity, SAP ERP = OpenTaps, OpenBravo, etc.
You can setup case studies to advocate the use of open source software and solutions.
This wouldn't just apply to software. You can also throw in hardware designs too (I'm thinking Arduino stuff).
A source of income could be companies that advertise on the site, offering their expertise in setting up open source business systems.