The latest stable release is the *3.4.0* : How to install it here.
Note: We just switched from BZR to Git on Github! (only to host the code and your future pull requests)
Avec AlsaMixer, Cairo-Dock se dote enfin d'un gestionnaire de son ! Créé par fabounet, cette applet permet de gérer le volume sonore de votre distribution avec élégance.
By the unstable release (SVN). Note, the SVN is development branch, so it's really contain bugs.
Once you are register, you can access to the wiki (WikiWing) with the procedure for installation (SVN)