Learn some basics about commodities and why you may want to invest in them from PIMCO Bonds.
Commodities involve risk and volatility. Forbes leads you to solid sites where you can check prices, get news and read commentary.
It's been difficult to find good, consistently reliable commodity charts (and we'd be interested in your additional suggestions), but the following are worth your consideration:
For current and historical charts and data—some as far back as 1833—use Kitco Precious Metals.