A common request for PEAR is too use SVN instead of CVS for source code management. As part of the PEAR2 project we are making that happen.
Were still working out all the naming conventions (and the rules for getting code into PEAR2). But SVN access should be widely available soon. Feel free to leave comments and suggestions.
Update: the svn url is now http://svn.pear.php.net/PEAR2