A Windows binary of this plugin by Claes G Lindblad (http://www.algonet.se/~claesg/shapeit.html), ported to 2.x by Victor Ramirez. Almost a "lost and found" plugin?
It bends a text or an image according to a shape.
Create the map on a new layer. Should be black and white for best results. Add an alpha channel to both layers.
PDF version of the tutorial by Claes included.