Take a look at the spread between LSC and DJP starting in late June 08.
Clearly this post is a little late to the party, but... WOW.
LSC is an ETN that replicates a technically traded long/short commodities index. It offers a compelling advantage over other commodities ETN's like DJP, and thus I will keep an eye on it. To track the underlying, Bloomberg SPTICTR:IND.
Sadly, it is less liquid than DJP, and contains credit risk via HSBC USA.