I'd like to find a logarithmic graph of the value of BTC vs the simple USD/time graph. Any suggestions of where to find that?
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not sure what you mean by logarithmic graph. The time in a logarithmic scale, or the value? On both, there is a "log" button below the graph. And you can export as CSV or JSON:
http://bitcoin.zorinaq.com/price/ goes back to 2010-04-25, which is the furthest I've seen.