If you’ve been trying to access the download server, I’m afraid it continues to be offline. We will try to have a replacement up and running by tomorrow. In the meantime, you can still access release tarballs via bits.gluster.com or from our GitHub repo.
And before anyone asks: no, this was not a filesystem failure.
UPDATE: download server is restored. For now, get GlusterFS 3.3.1, with older versions being rebuilt from scratch.