I've just installed Windows 8, and yes, there is no desktop gadget support ;)
But then I've found this...
http://winaero.com/blog/exclisuve-how-to-get-desktop-gadgets-and-sidebar-back-in-windows-8/
...and it works! :)
Download:
http://gdplayer.4fan.cz/DesktopGadgets.N.exe
edit 26.1.2013:
8GadgetPack - another small utility with which you can install the original Gadget program files on Windows 8.
homepage:
http://8gadgetpack.bplaced.net/