Bigace moved away from CVS and to Subversion.
Here is the info how to access the Bigace repository.
Checkout everything:
svn co svn://dev.bigace.org/bigace2/all/
Bigace v3 is better structured, you can checkout only the modules you need:
Checkout:
svn co svn://dev.bigace.org/bigace/core/
Checkout:
svn co svn://dev.bigace.org/bigace/extensions/
Checkout:
svn co svn://dev.bigace.org/bigace/libs/
Checkout:
svn co svn://dev.bigace.org/bigace/sniffer/