I've been thinking about something like this years ago. Basically I wanted to implement de Bono's "Six Thinking Hats" as a website that would assist an individual to work through a problem with the help of a community. So a user would not state his problem to wait for complete solutions suggested by others. Instead, s/he'd, for example, try to explain what s/he wants to achieve and ask for strategies. The community would then suggest some options ("yellow hat thinking"). Next, the community could weed out bad options ("black hat thinking"). If there were any ideas left one could ask how everyone feels emotionally about the remaining options ("red hat thinking") and then pick the most popular one. In a next step, they could brainstorm creative ideas to mitigate possible problems with the chosen option ("green hat thinking"). Afterwards the OP could summarize the outcome and state what s/he is going to do. If after a while some more thinking turns out to be required one could continue the process again. For instance, you could discuss how to deal with unforeseen challenges or - if the chosen option turns out to be futile - investigate one of the other suggestions in more detail And so on and so forth ...
However, I worried that most people would not have the time/patience to really get involved with a problem. Furthermore, the process might be to cumbersome and rational for real world problems.