Then I stumbled upon some linocut stamps on etsy, and have been dying to go to the craft store to get supplies to make my own ever since.
There's also screen-printing with embroidery hoops:
In high school I made stencils with freezer paper to print on bags and t-shirts, but this is so much more awesome. Specifically I'm thinking about DIY-ing some border prints, which can be hard to find in fabric stores.
I also think this would be great for re-creating some of the cute animal prints that are popping up all over stores now. Can you say whale-print shirt? Or hedgehogs?!
Coincidentally, there was very recently a post on A Beautiful Mess about using a foam stamp to add a print to a RTW dress. I think that I'll skip the foam and try linocut or embroidery hoops though - they looks like fun, and will definitely allow for more details.
In actual, currently-existing project news, Minoru, my seam ripper and I have been spending some quality time together lately. I fixed the rippley zipper issue, and then decided that there were a few more things I should tidy up. Hopefully I'll have a finished and slightly closer to perfect jacket ready to post soon.