Scheme's SRFI 49 (2003-2005, Final): "Indentation sensitive syntax": http://srfi.schemers.org/srfi-49/srfi-49.html
Lispin (2008): So utterly dead, we have to resort to the Internet Archive: http://wayback.archive.org/web/20080517144846id_/http://www....
cl-2dsyntax: http://www.cliki.net/cl-2dsyntax (Annoying exclamation marks in this one, oops).
CGOL (1973!): http://en.wikipedia.org/wiki/CGOL
The last one shows you just how long people have been unsuccessfully trying to promote Algol-like syntaxes for Lisp.