has now been released. Initially it's just on a few selected sites but will become widely available soon.
We are waiting on Ryan to release the 1.6 Linux server program. As soon as that is finished I will update the server.
I'm not sure at this time if installing the 1.6 patch will exclude you from 1.5 and older servers so I would suggest holding off from installing it right away.
lol.. new killcams: