I see I failed to make my point. Its indeed NOT simple. We keep thinking that it's simple: 'build some technology and people will come' but models like that have proven to fail quite often (especially on en.wp). You need to find the user stories, find the building blocks and see where you get the most return for your money/effort. If you want something to succeed, you need a very concerted effort that leads to integration and acceptance. Not just one thing: Let's build the map. You need a line of careful steps with goals and metrics, reflection and evaluation. One of those steps might be to "build the map", but it's definitely not the only one.
DJ