Someone led me to Emotional Baggage Check. The idea appears to be that people can leave an explanation of what's troubling them, or respond to other people's issues with music or words of encouragement. It sounds like a good idea (the current popular strategy of whining on a public forum seems to be more trouble than it's worth). It doesn't look particularly troll-proof, though.

If nothing else, I'd like to look at them in a year or so and see how it's turned out.