Here is a very first shot at a WW 'layer loader' for WWJ. It can create tiled image layers from a World Wind XML layer definition. No WMS yet.
Geocover 2000 in WWJ
This very first version only supports layers with a ImageTileService definition node - no support for WMS. I tested it with a copy of @Images.tmp. This should work for ZoomIt too.
I'm not sure WWJ supports WMS yet...
It works, but the download seems hazardous... not sure if WWJ struggles or the servers are slow.