Episode 52 of the Escape from Illustration Island Podcast features an audio interview with Illustrator Katherine Streeter. Together we discuss the world of collage illustration as well as her experiences in working with an art rep and creating pieces for gallery installation.
Here are links to some of the things mentioned on the show:
Katherine Streeter’s Website
Frank Sturges Reps
Drawger
Illoz
Picture Mechanics
Wise Elephant
ILLUSTRATION AGE 
Thoughts?