The bluez project's CVS data is in read-only mode, so the project may have switched over to another source-code-management system. To check, visit the Project Summary Page for bluez and see if the menubar lists a newer code repository, such as SVN or Git.
The CVS data can be accessed as follows.
You can run a per-module CVS checkout via pserver protocol:
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P Attic
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P Bluehood
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P bluefw
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P doc
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P firmware
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P gnome
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P hcidump
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P hciemu
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P kernel
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P libs
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P libs2
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P obex
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P packages
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P pan
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P rfcomm
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P sdp
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P utils
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/bluez co -P utils2
You can view a list of files or copy all the CVS repository data via rsync (the 1st command lists the files, the 2nd copies):
rsync -a a.cvs.sourceforge.net::cvsroot/bluez/
rsync -ai a.cvs.sourceforge.net::cvsroot/bluez/ /my/local/dest/dir/
If you are a project admin for bluez, you can request that this page redirect to another repo on your project by submitting a support request.