[CODE4LIB] predicted trend for pricing of cloud storage?

[Kevin Hawkins]

Could anyone point me to one or more sources predicting future pricing 
of cloud storage?  Like where the trend is going?

I see lots of writing about how prices have increased faster than 
inflation in recent years, but all the discussion of the future I'm 
finding is about how the market will continue to grow greatly in the 
coming years.  That's great, but I'm looking to estimate future costs 
for using services like S3.

Thanks for any leads!

Kevin