FunOS - Mostly functional (programming) OS in design, and fun to do system programming in; all policy code in kernel to be in Scheme. To support multiple APIs, and be runtime extensible: replace parts of system on the fly and, within security constraints, by ordi - http://www.sarg.ryerson.ca/funos/
Thoughts-on-a-LispOS - Brief description, with careful wish list outline; wiki. - http://community.schemewiki.org/?Thoughts-on-A-LispOS
Lisp-based OSes - History, considerations for operation, list of projects with links (some updated, some not). - http://linuxfinances.info/info/lisposes.html
LispOS Info Page - Brief history, and link to mail list archive, begun April 1997, closed February 1999, by Richard Coleman (of ZSH), to coordinate efforts to make a free OS to return to users the power of Lisp Machines. - http://lists.tunes.org/mailman/listinfo/lispos/