We have just started a new version numbering convention, replacing the previous convention of numbering our versions after the date of release. Our first release following this new convention is 1.0.0, which is now available for download at http://panda3d.etc.cmu.edu/download/ .
The CMU team is now taking responsibility for hosting the Panda3D source code file releases as well as the binary releases, so starting with this release you should look to the Panda3D download page (above) for source code releases, instead of downloading them through the File Release system of Sourceforge.