John Petersen has written another excellent article, this one based on information he learned from NanoMarkets' thorough analytical report on the smart-grid energy storage sector and its potential for staggering growth. It's well worth the read. I'd like to get a hold of the actual report produced by NanoMarkets, but at $2,495 it's a bit out of my range. There's a link in the Petersen article to NanoMarkets where you can order the report in case anyone is interested.