DoDo, this is excellent, but i must point out that cost numbers are skewed as Chinese panels enter the market at much lower costs.  Actual performance (including long-term) has to be taken into account for true numbers.  From a colleague, it seems chinese exports to California's solar rush went from several % to around 30% in just several years, or so i'm told.  (don't know actual figures.)

But the trend is clear, following exactly as the industry predicted, and wind has shown is valid.

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin