This major feature adds support for GNU maintenance, distribution, and release standards <http://www.gnu.org/prep/standards/html_node/Managing-Releases.html> as implemented by the GNU Autoconf, Automake, and Libtool software packages. Note the operative word here: "adds". This feature does not replace the current configure and build scripts: it only supplements them. (That is not to say it may replace them in some future release however.)
Latest prototype branch is located at http://svn.apache.org/viewvc/stdcxx/branches/autotools/. Wiki page is located at http://wiki.apache.org/stdcxx/AutoTools.