You can read the entire aritcle online! Go to Select back issues. Go to bottom of page, Contents of August 2003 issue. Select "Catch the Fire."
This is a faily long article about Bill Gross of "Knowledge Adventure" fame and he and his team at Idealab in their quest for power. He has his feet on the ground and does his home work. If anyone can come up with a practical and economical "Solar-Stirling-Generator" hs is the one likely to do so.Unfortunately it may take a few years to get funding and productio up and running.
At $250 a pop for 250 Watts isn't too bad. $1,000/KW Output!
This is the first practical proposal for a production engine to appear viable on a manufacturing and cost basis.