There's an ETF for every moment and the current star is a FactorShares' double-levered long gold/short S&P 500 fund (FSG +2.8%). It's had a pretty fair recent run, +44% in the last 30 days.
ETF Screener: Search and filter by asset class, strategy, theme, performance, yield, and much more
ETF Performance: View ETF performance across key asset classes and investing themes
ETF Investing Guide: Learn how to build and manage a well-diversified, low cost ETF portfolio
ETF Selector: An explanation of how to select and use ETFs