Kristy Cunnigham's Infinite Spiral webcomic is at http://enterthespiral.tumblr.com/
Carl Yonder is at http://www.carlyonder.com/index.asp and
https://twitter.com/carlyonder (thanks to Randy T)
Kathleen Brenowitz* is at www.ksbrenowitz.weebly.com and a tumblr at www.puzzlinghappenstance.tumblr.com
Tangent Artists*, a webcomics coop, is at http://www.tangentartists.com/
*I've got Washington City Paper interview answers from them which should appear sometime in September.