Well I like the idea, but the problem with up-time, is that it changes in real time. We can grab the up-time at the time of the most recent audit.... but obviously this will always be incorrect, as time will have passed between then, and now, and the box may even have been re-booted in the interim.
or, we could code a link on the system pages to throw back a vbs script to the browser to find the current uptime of the box being viewed.
See here for an example
http://www.microsoft.com/technet/script ... y0802.mspx (Note: read the comments on the page, this method only works for 2003 and XP, anything older (W2K) or non windows (Linux) wouldn't be covered by this script.)
Which would you see as being most useful?