Generally, if I want to see how long the server has been up, I either have to scroll to the very top of my combat log (if I've just joined) or look in my Combat Log in Client Extension (if I've been IG for a while.)
It'd be nice if there was a command, like /serverup or /timeup or etc., that would show how long the server's been up.
Or maybe just add that information to the existing /time command?