This alpha version is available via two means. Firstly via the public FTP and HTTP sites mirroring the Mandriva Linux repository. Check the current development mirrors at CookerMirrors, the 2007 Spring Beta tree is in /devel/2007.1/. Second, the preferred way, via either the provided One CDs (installable live CDs), or the intallation mini CD i586 and x86_64. You will find the live CDs and the installation CD in the same mirrors as the cooker one, in the /devel/iso/2007.1/ section.