Actually Konfabuilator (or what ever that thing was called) was derived from desktop gadgets (or something, I can't remember what they are called!) from the original Macintosh.
Also, the dock is completley different from the taskbar. The taskbar is document-orentated, that is it shows all the open documents. The dock shows all the open programs. The taskbar has the start menu for opening "Control Panel", recent documents, "My Computer", ect, ect. The Mac has no equivient (which is a good thing, IMO). The only thing similar is the fact that they both open programs (albeit by different means-Start against an icon). The taskbar and the dock are fundamentally different.