According to New Energy Technologies, they've perfected a spray on coating for normal glass that will allow the glass to act as a window whilst providing power generating capabilities. Colin -- cdb, 3/07/2009 -- colin@btech-online.co.uk -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist