They should work on any device with WVGA resolution, and have also been reported to work on Galaxy Tab. However, they may not work if your device has non-standard DPI settings.
Secret Wallpaper 1 is a beach scene and Secret Wallpaper 2 features windmills running peacefully along the country side. Both wallpapers use your GPS co-ordinates or coarse location to change the weather depicted in the scene, and to switch from day to night.
Smartkeitai editor CJ Lippstreu has made two videos showing the live wallpapers for SmartKeitai.com Please hit like on their video, and subscribe to their channel for more smartphone videos.
Beach one was too large to attach, so here's a mediafire link
EDIT: 07/12/2011 updated apks to latest version from Galaxy S II. The files have a smaller install size.
At the time of uploading the newer version, SecretWallpaper2.apk had 61111 downloads.
EDIT: 21/02/2012 updated apks to latest version from Galaxy S II ICS leak. The files have a smaller size, and work on my TouchPad Running ICS
Windy weather = Windmill Live Wallpaper
Ocean weather = Beach Live Wallpaper