You can use the PHPee.com CVS repository as an anonymous user, or as a developer. You will need a CVS client, if you don't already have one. CVS should be installed with most modern Linux distributions, easily available on *BSD systems, and there are clients for Win32, MacOS, and GUI clients for the Unices. A number of them are available at http://www.cvshome.org/.
The following command lines should be the bare-bones needed to get you started with PHPee and CVS; this is not a CVS tutorial, however. The standard CVS documentation is available here, and there are many HOWTOs available on the web.
You can obtain a current copy of the source code of each project using CVS. Here is how to check out the latest HEAD:
$> cvs -d :pserver:email@example.com:/repository login
$> cvs -z3 -d :pserver:firstname.lastname@example.org:/repository co modulename
...whereas modulename is one of the following: sourdough, pigalle, yabook, pphlogger
Note: If you get an error from cvs when using the login command (cvs login: warning: failed to open /username/.cvspass for reading: No such file or directory) then repeat the login command.
If you already have an existing version of any module and want to update:
$> cd <your module directory>
$> cvs -z3 -d :pserver:email@example.com:/repository update -APd
For Windows users, there are a number of graphical CVS clients available such as the very capable and easy-to-use TortoiseCVS. You should also try a current beta version of WinCVS.
As usual, it is not guaranteed in any way, that the latest CVS HEAD version will work for you properly. Pigalle, YaBook and the Sourdough framework itself are still in their early development. It may break your current installation and may destroy data stored in your database! On the other hand, downgrading may cause the same effect.
And, maybe you will have to update you configuration files (passwords, services, paths etc.) again.