I have just installed the 6.0.1 beta on a spare machine. Like Debian
modification releases (the digit after the second point) and as per Ruben's
announcement it is just an update of the install CD to the latest maintenance
levels. Perhaps including a few improvements that are yet to hit the repo.
So apt on the machine in question points to toutatis.
Therefore there is no need to update, you're already at that level or will be
automatically shortly.
However, it does need testing. So if you have a spare machine, some spare
disk space on an existing machine or even have spare room to run a small
virtual machine on your existing install - then please test, the more eyes
the better.