How can I distort a shape so that it looks like it's drawn on the side of a cylinder? I.e. vertical lines should stay the same (just moving up or down depending on the location), and horizontal lines should become ellipse arcs.
I found a solution at http://screencasters.heathenx.org/episode-088/ , using the Bezier Envelope extension by Gerrit Karius. I made an envelope with some beziers that approximate ellipse arcs, intersected with a rectangle, and after some fiddling, I managed to fit the shape to it using the extension.