Here are the current versions of Iridium:
A DLTA for ThemeChanger & ShapeShifter
Currently, Iridium is still PPC only. This is because ThemePark cannot read the Extras2.rsrc file unique to the new Intel-based Macintoshes. I suspect that this is due to OS design and not a failure in ThemePark. Hopefully, I am wrong and there will be an update to that application shortly.