how can I tell what display setting I am using? [solved]

I working on a "characteristic" table for various linux distributions on the ASUS eee mini-laptop. One of the column is
whether the distribution is using 800x480 after installation (instead of the user having to "hack" the display setting).
And I want to document so others can see what display setting they are using. So...

How can I tell what display setting I am using? At first glance, I didn't see anything from /etc/X11/xorg.conf - although
I could be looking at it wrongly.

Sheng-Chieh

p.s. This issue arises from

http://forum.eeeuser.com/viewtopic.php?id=21202

Exactly what I wanted. Thanks!

Sheng-Chieh