Hi All, As Brian mentioned on today's telecon, he and I are part of a committee organizing a conference about Cosmic Polarization Rotation (e.g. birefringence, etc.) in Florence, September 7-8 of this year. The conference will be held in Galileo's house, where he was confined to house arrest until his death for his heretical ideas. Please see our website <http://www.arcetri.astro.it/cpr/index.html> for more information and for registration. Registration is open now! We hope you will join us! -Jon