The Reputations Research Network is collecting research on reputation systems (hence the name).
Reputation and managing it across time and context will be a key role for someone or something on the Net. It will be interesting to see if it is possible to develop a portable reputation (vs. the local reputation users have within systems like eBay or amazon.com).
Here’s the Reputation Research Networks mission:
This site is for researchers who are studying how reputation systems should work in theory, how they actually work in practice, and how they could work better. You can find out about people, papers, and practical systems. And you can contribute pointers to useful information.
Note that the NYT wrote an article about this project called More Companies Pay Heed to Their ‘Word of Mouse’ Reputation.