Building a trust system into a social app
tlib747: I can add yet another approach to your list, the one that we've developed for trustedones.com (a trust-based social networking app).Basically, we mimic the word-of-mouth recommendation model. The people you trust the most, are those you know well - yourself, friends, their friends, and then all trusted ones (the wisdom of the crowds).
You build your own network of people you trust, and quickly slice and visualize information.Here are a few links that you may find interesting. We're still tweaking stuff, so let me know if you have any thoughts on what we can do better.
http://arnox.trustedones.com (my page)http://maps.google.com/?q=http://www.trustedones.com/feeds/g... (all of my local recommendations on a map)http://www.trustedones.com/topic/restaurant-local/listing/bo... (sample recommendation)