Ok, technically its 2 x 1/2 watts. Looks promising, june availability:
http://www.swerveyourbike.com/
http://www.cyclelicio.us/2008/04/princeton-tec-swerve-bicycle-tail-light.html
http://www.swerveyourbike.com/
http://www.cyclelicio.us/2008/04/princeton-tec-swerve-bicycle-tail-light.html