The following is a list of WoW related comics. Feel free to post links to any other WoW related comics that you find.
Looking For Group http://www.lfgcomic.com/ Very professionally done comic. Richard (the Undead Warlock) seems to be becoming a bit of an icon . Not quite WoW however the characters are based on WoW (Horde) characters: Blood Elf Hunter, Forsaken Warlock, Tauren Warrior, Troll Priest. Updates on Monday and Fridays
The Chronicles of the Flaming Ruby http://www.theflamingruby.net/chi/ Based on players from the EU Alliance (Argent Dawn) guild Order of Flaming Ruby. Tend to be multi-part comics. Main character is Chidori a Human Mage. Updates weekly or so normally however they have been infrequent as of late.
Dark Legacy Comics http://www.darklegacycomics.com Characters are based on members from the US Alliance guild Dark Legacy; Keydar (Human Rogue), Miji (Gnome Warrior), Gigz (Night Elf Priest), Krom (Human Paladin) are recurring characters, other DL members make various appearances. Updates on Sundays (late for us EU types)
The Adventures of Blanc http://www.backbreaker.com/%7Esmudge/Wo ... BIndex.php Adventures of a naive Night Elf Warrior. Updates infrequently right now.
The noob http://www.thenoobcomic.com/ Interesting WoW related comic.
Shakes and Fidget http://www.shakes-and-fidget.com/ German only comic, there are plans for English translation. The first 19 or so where translated into English and were posted on WorldofWar.net as Heros of WoW but the link has been lost. Follows the misadventures of Shakes (Human Warrior) and Fidget (Gnome Mage).
Manic Graffiti http://manic.comicgenesis.com/ (normally) weekly comic, black and white pen based art. Alternates between the normal Alliance centered one and the "Hordelings" set of characters.
The Adventures of Messy Cow http://messycow.com/manga.php Chinese manga comic (translated in English) following the adventures of a Tauren Shaman and those she subjects to her n00bishness
Dragontouched http://www.e-c-t.ca/dragontouched/ Episodic story comic following a Night Elf Druid. Recommend to start at the beginning.
Hammer of Grammer http://www.hammerofgrammar.com/ Another hilarious comic (linked once before on these boards) about a Human (Priest or Mage) and a Dwarf (Hunter or Warrior)
/silly http://www.wowinsider.com/category/silly A regular comic feature on WoWInsider.
Other gaming related comics (often have WoW topics)
GU Comics http://www.gucomics.com Single pane comic. Often has WoW or other MMO related themes. Updates Mon-Fri
Penny Arcade http://www.penny-arcade.com Another legendary gaming related comic.
(Update 11/11/07: Added several comics to the list, fixed an error.)