Been reading about them for years, with initial skepticism, but growing excitement the past year or so. This months SOARING has them featured in Bill Collum's column, "soaring tech", June 2008 page 19-22 Heady stuff! I'm sure many here are aware already, and hopefully some are already testing somewhere... ....or maybe some already know why this isn't gonna work... JR www.roenation.com More online: http://sinhatech.com/