If someone wants to make a banner using the logo, you can find the logo here:
http://4dimensions.org/images/splash/deco_logo.gifYou can make a banner easily using something such as GIMP
http://www.gimp.org or Photoshop's Free trial
http://www.adobe.comHere's a thread from a large scale ad network that serves banner ads on how to make an effective banner ad:
http://blog.adroll.com/bid/98464/Creating-an-Effective-Web-Banner-5-Tips-for-SuccessUnfortunately I'm out of time but if you google "game web banner" and click Images to go to Google Images you'll see a ton of great examples.
Good luck and feel free to hit me up in the game or on here if you need any further advice.
-Once