To keep in line of not having multiple threads and the almost certain flow of feedback for Zwoptex 1.5 I'm going to dedicate this thread to the updates.
Today I've released Zwoptex 1.5a1 ( alpha 1 ) of which includes many requested features such as extruding, padding, pixel formats, dithering, interface updates combining the list and graphical view, etc.. You can read the full details and release notes on the blog.
While very stable Zwoptex 1.5a1 is in alpha stage because of deprecation of the .zss format. Migration support will be added but isn't just yet available.
If you have any feedback, comments, etc.. please feel free to leave them here, the blog, or PM me as I'd love to see what people think of the latest version.
-Robert