Correlating BTC price changes with recent use in commerce Is any data available on the amount of bitcoin used in actual commerce, as opposed to investing in bitcoins, during specified time periods?

(I'm wondering whether the recent increases in dollars-to-bitcoins ration are correlated with amounts used in business via things like BitPay or otherwise.)
That's the thing about a pseudonymous digital currency -- there's little information that can be gleamed from the blockchain data.

There are some metrics reported in aggregate by the payment processors and others.  For instance, last month BitPay shared during a discussion that they had surpassed 10,000 transactions since their launch over a year earlier.  They didn't provide the number of bitcoins as well or give the average amount per-transaction.  They are probably the largest payment processor but even that amount is pretty insignificant.

This data will probably be most accurately obtained through user surveys and from there extrapolate.