Following the successful Orion project creation review, the Orion code and downloads are moving to their new permanent homes. Orion downloads are now available here:
http://download.eclipse.org/orion/.
The Orion code repositories have moved to:
http://git.eclipse.org/c/orion/org.eclipse.orion.client.git
http://git.eclipse.org/c/orion/org.eclipse.orion.server.git
The June 2011 0.2 release is still moving through the Eclipse process, and should be available next week. Meanwhile you can enjoy the release candidate, which should be identical to the final release in all but name.