probably a silly one this..
but how do I keep 710 updated with the latest patches etc?
(you can tell I come from a windows background??)
Well with the LinuxMCE Beta's you will not receive any automatic updates... you can manually update packages using apt from the Console though.
With the LinuxMCE 0710 release version you will automatically get updates when they are needed and you will get an on-screen message to alert you when an update has been downloaded.
Manual updating of packages can be done of course using apt but there is the risk that you may cause unforeseen breakages by doing so. As long as you are careful and read any warnings before you commit to installing with apt you should be ok though.
Hope this helps