Dr. Levin has posted two of his abstracts from the ongoing SPIE conference online at:
SCIENTIFIC LOGIC FOR LIFE ON MARS
http://www.spherix.com/Mars/spie2/ScientificLogicWithFigure/ScientificLogicWithFigure.htm
THE OXIDES OF MARS
http://www.spherix.com/Mars/spie2/Spie2001Oxides/Spie2001-oxides.htm
I'll be interested to see if Barry DiGregorio places his abstract
Rock varnish as a habitat for extant life on Mars, B. E. DiGregorio, Cardiff Univ. (UK) [4495-13]
online as well. There is, however, a rather interesting article online about rock varnishes in general in the latest issue of GSA Today.
Rock Varnish: Recorder of Desert Wetness?. Wallace S. Broecker, Tanzhuo Liu, pages 4–10.
See:
http://www.gsajournals.org/gsaonline/?request=get-document&issn=1052-5173&volume=011&issue=08&page=0004
Alex R. Blackwell
University of Hawaii
Gil Levin's SPIE 2001 abstracts