[boost] Inquiry of standardization status of boost::format

Due to the limitation of gettext usage with standard iostream, there's a proposal to improve the case in glibmm's string implementation [1], whose goals resemble boost::format very much. There's a thought that if boost::format is going to be standardized, then it's better to adopt the boost syntax and ease switching to standard in the future. So is this happening? How's the status? [1] http://mail.gnome.org/archives/gtkmm-list/2007-August/msg00055.html