A possible software security issue may have been the reason why support for the desktop gadget feature has been removed in current but unreleased builds of Windows 8.
Desktop gadget RSS
Newly leaked screenshots from an unreleased build of Windows 8 reportedly shows that desktop gadget support won't be a part of the OS when it launches later this fall.
Horloger is a standalone gadget that puts a great looking clock on your Windows 7 and Windows Vista desktop. it comes in 2 sizes, 4 styles, many different languages and works on both 32- and 64 bit