Here are straddles and strangles for September 2009, December 2009, and January 2010 for IWM (my favourite), SPY, UNG, and UCO.
Maximum moves required for each are shown in the yellow-shaded line. If the underlying moves this much, the position will be profitable at expiration. Note that depending on the length of the time to expiry, the position can be profitable with much smaller moves.
For September 2009:
For December 2009 and January 2010: