ShantzTodayChanger is a little tool written by me for your Windows Mobile based phones (WM5/WM6) which will cycle ur today background or theme after a set interval of time. It has a lot of features and options and you can even use it to achieve something other than changing wallpapers as well (e.g. running applications at set times) but that depends on your imagination.
Changes in this version:
1.53 - 23-March-08 -> RECOMMENDED UPDATE
i)Theme Color Detection has been improved a lot. Should work much more accurately now.