- http://BitRated.com
BitRated takes advantage of mutlisignature transactions such that buyer and seller will each have a key but also the individual from BitRated chosen for arbitration will receive a key as well. Two of the three keys are needed to spend the funds from the transaction.
Even if you aren't needing this type of transaction, it is still a good idea to register on BitRated and to build connections there (e.g., vouch for those who you've traded with and ask others who trust you to vouch for you). This could become a very useful tool for those doing face-to-face trading as well as online trading.