How does the price of 1 BTC compare to other commodities? I'm looking for a chart of Bitcoin's price and market cap to other commodities like silver, gold, etc.

Does such a chart exist?

Why is this useful? Because I want to see how the USD compares to similar non-Fiat, limited quantity resources.  This should show how Bitcoin is undervalued, or would give us insight into the trade volumes.

If it doesn't exist, I'll create it myself for the benefit of the community. Where can I get historic gold &amp; silver pricing in USD?
http://pricedingold.com/charts/BTC-2010.pdf This is a comparision chart for btc vs. miligrams of gold i guess you could reverse it against history of silver or some other commodities. You can get the complete article here http://pricedingold.com/bitcoin/