There are a couple of services out there. Bitgold is one of those, it has an affiliate campaign, however, there has been some claims that their services are a scam.
Your best bet will be something like Digix, where you have tokenized gold residing in Ethereum's blockchain.
Thanks for the hints Mookid,
I've seen bitgold, and something didn't feel quite right about the site to me, would be intersting to hear from people who are using it about their experiences. I'll check out their thread. I haven't seen Digix, I'll take a deep look into it over the weekend about how it all fits together and post back with my findings in case anybody finds it interesting.