Here are the tickers of some ETFs which I found particularly interesting or meaningful :
BIL — SPDR Lehman 1-3 Month T-Bill ETF.
BND — Vanguard Total Bond Market ETF.
CUT — Claymore / Clear Global Timber ETF. You wanna CUT down a tree?
GLD — Gold ETF streetTRACKS Gold Shares.
KOL — Coal ETF.
LQD — iShares iBoxx Invest Grade Corp Bond ETF. Need LQUIDITY?
SLV — Silver Trust ETF.
And the best one for the end :
MOO — Agribusiness ETF. Got Milk?