The classes have been repackaged under org.concordion.ext. Any users of concordion-extensions v1.0.0 will need to update their package definitions with this new release.
If anyone has ideas for additional extensions, please discuss them on the Concordion mailing list.
Oct 26, 2014. These extensions are now packaged as individual projects and hosted on Github. See http://concordion.org/Extensions.html for details.