There are two precious little webcomics over at http://www.secretfriendsociety.com/ I am in love with the black+white+one-other-color style of Salamander Dream, but the color sense of Jellaby is also very nice.
Here's a moderately clever manual way to do screen printing without photo emulsion. None of the steps are particularly amazing, but I think it's pretty resourceful that she used a cheap-ass embroidery hoop and plain ol' white glue.