Okay, honest I haven't joined the Dark Side... Somebody asked for a website logo for their guild.  There's some examples listed below.

Their Guild:
http://www.deathiseminent.com/
 
Other Guilds:
http://www.the-combine.net
http://www.keepersofchaos.com
http://www.kimone.net/phpBB/index.php
http://www.camelotherald.com/
http://www.darkageofcamelot.com/
http://daoc.houseofsagacious.com/
http://www.theblackrose.org/  
http://sw.ac-darktide.com/main.htm
http://www.0utline.com/tt/news.asp