Gretchen Hasse not only designed the postcards and posters she is one of the artists being shown at Constantly Consuming Culture--The Art Show. You can check out the sort of work she will be showing HERE and HERE.
These specific pieces are not in the exhibit but they give you an idea of what Hasse's work is like. She is a video artist, she draws, she paints, she does collages and mixed media.
From Hasse's website--"My inspiration includes travel journals, videos that I produce for social justice groups, and life lessons that take a really long time to learn.
I frequently incorporate recycled materials into my two dimensional work, and I am beginning to draw on my own considerable catalog of older work for ideas and elements in multimedia."