Besides the annual comic art show at Altered Esthetics in November 2013, there are a number of other open calls for art for shows coming up on their calendar this year that I imagine will have great appeal to cartoonists (like the show about BEER for one thing)… check out the full list with details and deadlines here.
February/March: Straight Trippin’
April: Brewers’ Craft and Coloring Outside the Lines VI – Blast Off!
May: [Insert Title Here]
June: Bike Art VIII
July: Physique & Technique
August: Time Honored
September: Fabled
October: Knock on Wood
November: DÃa de los Muertos and Comic Art
December: Knot What it Seams