Inflatable Solar Panel
 

I came upon this site the other day: IDC / SolarStore Inflatable Solar Collector

They have an inflatable solar panel. Pretty simple setup and it says it can get water to 80C / 176F. Thats pretty darn hot. I guess the downside would be that its not as rigid as a true solar panel, but the major advantage would be the price. According to their video, this nearly 2 square meter (21 sq/ft) collector only costs $150.

Brochure: http://www.idc.uk.com/solarstore/SolarStoreBrochure.pdf

http://www.idc.uk.com/solarstore/ima...l-Diagrams.gif