We have no ETA and no script that e-mails you when your are inactive. You should naturally just visit the forums, so there really is no need for one that I see.
I am actually going to re-open this (You need to be loggedin to facebook to use it, I tried and it works fine).
I think you have a spelling error though, 'Practise' should be 'Practice'.
No it won't. All you need to do is visit the forums, you are not required to post on the forums.
You can unsuspend yourself via http://staff.x10hosting.com/suspended.page/.