Yay, webcomics!
List of the ones I follow:
The Meek - meekcomic.com - Fantasy, I guess, ongoing, exciting story so far with great art and great characters, pretty new.
Hark! A Vagrant - harkavagrant.com - Comics by Kate Beaton, witty, mostly about history and other fun things that pertain to my interests.
Manly Guys Doing Manly Things - thepunchlineismachismo.com - Fun videogame humour strip about ridiculously macho men.
xkcd - xkcd.com - nerdy humour.
I tried to read Homestuck and aborted after a day of going through it with no end in sight. I may go back to it when I have some time to read it (aka when not procrastinating for something else). I've also recently discovered Dinosaur Comics (qwantz.com), and I am beginning to love it.
(sorry about urls everywhere, can't directly link stuff yet)