Version 0.1 of cl-l10n has been released, it is downloadable from http://common-lisp.net/project/cl-l10n or via asdf-install.
cl-l10n has support for locale specific printing of numbers, monetary values, dates and times. It also has support for internationalised strings using bundles and the gettext function.
For more information see the documentation with the distribution.
Regards, Sean.