At Microsoft, we're encouraged to try as much as we can of our fellow teams products, even if it doesn't directly relate to our working area. Admittedly most people don't need encouragement to try new things. :)
One of our newest products is Windows Live One Care. Some folks have been wondering if it works in SBS environments. Of course it does! I'm actually running it on my client at work, which is joined to our server, and low and behold, I have the green check.
I was able to use or disable the client backup (I disabled it because everything on that client is re-directed to the server and it would have been redundant). My firewall is up and running and my automatic updates (provided to me by WSUS) show nothing but a green check.
So have fun, check it out and enjoy the safety!