For RTB enabled servers, you can hit the information button to see who's on, if they're an admin, and the add-ons the server has.
It would be very useful for the host to be able to write a short, maybe 140 character description about what the server is all about, recent updates, a link to the topic, etc.. Many servers have odd names and the short title is not enough to say what it is. For example, a server named "Storm the Beach" could have a description like follows:
Storm the Beach
A WWII Normandy invasion server with American and national socialist teams, using NEKram's updated pack. The last update includes music, so make sure to enable downloading!
http://forum.blockland.us/serverthread/
by Bedpost and Eliptats
This is just an example. A text box could be added to the bottom with this short description. I don't think this would be too hard to implement and could provide more clarity, especially to players who don't see server topics on the forums.