GOOD WEBCOMICS:
http://www.qwantz.com - Dinosaur Comics
http://www.drmcninja.com - The Adventures of Dr. McNinja
http://www.girlyyy.com - Girly
http://dylanmeconis.com/familyman/ - Family Man
http://www.jerkcity.com - Jerkcity
http://www.achewood.com - Achewood (though it's been shaky lately)
http://gastrophobia.com/ - Gastrophobia
http://www.yellow5.com/pokey/ - POKEY THE PENGUIN
http://gunshowcomic.com - Gun Show
http://octopuspie.com - Octopus Pie
http://dominicdurgan.comicgenesis.com - Dominic Durgan
http://www.strippycomics.com - Strippy Comics
http://rice-boy.com - Order of Tales
http://www.sugarboukas.com/PD/ - Pug Davis
http://www.lackadaisycats.com - Lackadaisy
http://www.slowwave.com - Slow Wave
http://www.succubi.org/db/index.html - Listening to 11.975MHz
http://picturesforsadchildren.com - Pictures for Sad Children
http://www.templaraz.com - Templar, Arizona
http://www.kukuburi.com - Kukuburi
http://www.adultwebcomics.com/comics/geesten.php - Chester 5000 XYV (not work safe)
http://www.mspaintadventures.com - MS Paint Adventures
http://c.urvy.org - Curvy (not work safe)
http://www.oglaf.com - Oglaf (not work safe)
http://harkavagrant.com - Hark! A Vagrant
http://www.nedroid.com - Nedroid
http://kiwisbybeat.com/great.html - Great

DEAD WEBCOMICS (still good):
http://www.leisuretown.com - Leisure Town
http://plif.andkon.com - The Parking Lot Is Full
http://www.kidradd.com - Kid Radd
http://www.sexylosers.com - Sexy Losers (not work safe, often not mind safe)
http://www.ghastlycomic.com - Ghastly's Ghastly Comic (similar to Sexy Losers)
http://www.purplepussy.net - Purple Pussy
http://www.cutewendy.com/ - Cutewendy
http://www.atomictoy.org/comics/buttlordgt/buttlordgt.html - Buttlord GT
http://www.comicswithoutviolence.com - Droop
http://horribleville.com - Horribleville
http://anderslovesmaria.reneengstrom.com - Anders Loves Maria
http://www.drunkduck.com/Nintendo_Super_Squad/ - Nintendo Super Squad (for all intents and purposes)
http://www.garenewing.co.uk/rainboworchid/index.php - Rainbow Orchid
http://sayunclecomics.livejournal.com - Say Uncle (basically)
http://www.pbfcomics.com - Perry Bible Fellowship
http://www.kiwisbybeat.com/minus.html - Minus
http://www.fanboys-online.com - Fanboys

Miscellaneous:
http://www.medium-large.com - Medium Large (used to update, but current status is unknown)
http://www.jenwang.net - Jen Wang (she is awesome)
http://badwebcomics.blogspot.com - Your Webcomic Is Bad and You Should Feel Bad (doesn't exist anymore but I forget where the archived posts are)
http://binsybaby.livejournal.com -  Emmy Cicierga (doesn't do a regular webcomic but does great art/one-offs)