I'm setting up a site to offer gold and silver in exchange for Bitcoin.  I understand the trust issues, and so this is mostly intended for anyone in the Austin, TX area so that I can deliver the items in person at the time of Bitcoin exchange.

In the future, I plan to provide a vendor rating system and to offer less expensive items so that trust can be built on my trading sites.  For now, this is what I have:

http://goldandsilver4sale.blogspot.com