Weregeek

A webcomic I discovered fairly recently was Weregeek.  The whole webcomic is a celebration of nerdiness/geeky things in all its forms.  The basic plot is about a (at first) normal guy, Mark, who stumbles into a group of geeks playing Vampire: The Masquerade and discovers the beauty of relishing in his inner geek.  It's really awesome because each chapter of the story cycles through various different games.  Sometimes they'll be playing D&D, sometimes Shadowrun, sometimes Vampire: The Masquerade, etc.  The comic will alternate between showing the people playing the games and what it looks like in those peoples' imaginations.  There's also a couple stories running throughout the entire series (some interpersonal drama, some strange fantastical mysteries, etc.) that are intriguing in their own right.

As with most webcomics, the art style has drastically improved since the beginning.  The characters are all highly amusing and unique, the hilarious puns and punchlines are well-written, and the celebration of things geeky is a thing of beauty.  It does make me a little sad that (as far as I know) I don't turn into an awesome were-beast when I really geek out, though.