I followed the directions to the letter, configured the file making sure to set what you mention, even setting exactly what you have for settings, I uploaded it to the correct folder and made sure permissions were correct, then enabled it in winterboard and even powered the phone off/on but nothing shows up at all?
I've disabled most other things in winterboard except some colored sms balloons and a different battery icon, and I've got the 5 icon dock enabled, could this be the issue?
*removed five icon dock and restarted springboard, still no go*
*without reading 20 pages of comments to see if someone else already mentioned this I'll note for the stoners like me out there, don't xfer the ENTIRE weatherwidget.theme folder that contains the '__MACOSX' and 'WeatherWidget.theme' folders, JUST xfer 'WeatherWidget.theme' folder INSIDE THE MAIN 'WeatherWidget.theme' folder*