Foresight Senior Associate Robert A. Freitas Jr. has just completed a lengthy technical risk analysis of some "gray goo" scenarios which may be relevant to our discussions of nanoreplicator safely and regulations. The title is Some Limits to Global Ecophagy by Biovorous Nanoreplicators, with Public Policy Recommendations . (Thanks go to Senior Associate Robert Bradbury for getting this into html.) If you're coming to the Gathering, try to read or skim this first. Additionally, you may comment below or by using Crit; to do the latter, click here.