stenciled shirts in the past, using vinyl cut on my Silhouette as a stencil. It works pretty well, although I'd love to try their stencil vinyl or freezer paper. I tried cutting freezer paper on my Silhouette a year or two ago, and it didn't work at all, but now that I have new mats(yes!) I am thinking it might work after all.
Craft-O-Maniac, Skip to My Lou, Sugarbee Crafts, Shwin&Shwin, Tatertots & Jello