UPDATE: 24 March, 2011.
Full functionality has now been returned to the Copy Site function. The objects that may have encountered errors on the copied site should now copy across cleanly and without issue.
Thanks for your patience and understanding while we fixed this feature.
Just to let everyone know that the copy site feature is now live. It will have a few issues around the data for some objects not being copied or causing an error. We will fix this over the coming weeks.
Basically, you will be able to copy your entire site across (as before) and all objects will be copied. Some objects like the Forum, Comments, Poll will not copy across the data. They should copy across empty without error but their may be chance that they show a 'loading' error.
All you need do is click on the object (if showing 'loading'), note the location (X,Y) and dimensions (height and width). Then delete the object.
Go to Insert on the toolbar and add a new widget, and then position and resize. It will now work.
If you have any issues please let us know.
Sorry about the wait this has been a thorn in our side too.