Online cartoonists you should check out:
John Allison's Scary Go Round
Adam Aylard's Piece of Pork
Neil Babra's Neilcomics
Vera Brosgol's Verabee
Max Clotfelter
Eddie Campbell's Fate of the Artist
Jordan Crane's Reddingk
Eleanor Davis's Doing Fine
Vanessa Davis's Spaniel Rage
Patrick Dean
Antar Ellis's Liner Notes
Patrick Farley's Electric Sheep
Brian Fukushima's Bottomless Pop
Dorothy Gambrell's Cat and Girl
Shaenon Garrity's Narbonic
Cat Garza's Magic Inkwell
Tom Hart's New Hat Stories
Kevin Huizenga
Derek Kirk Kim's Lowbright
James Kochalka's American Elf
Kazu Kibuishi's Bolt City
Hope Larson
Alec Longstreth
Les McClaine's Evil Space Robot
Scott McCloud's Morning Improv
Tony Millionaire's Maakies
Chris Onstad's Achewood
Jesse Reklaw's Slow Wave
Jeffrey Rowland's Wigu
Souther Salazar
Kean Soo's Keaner.net
Jerry Stanford's Carpal Tunnel Press
R. Steven's Diesel Sweeties
Devlin Thompson's Early Works
Greg Vondruska
Pendleton Ward's Bueno the Bear
Todd Webb's Toddbot
Joey Weiser's Tragic Planet
Chris Wright's Godbuckle
David Yoder is Awesome
Dan Zettwoch