I didn't refer to it (see above), but for sure it could be a nice add-on feature to provide.Actually there is a progress bar for the phase of disks copying (after the 'initialization' phase) in the 'status' column of the virtual machines tab.
And what about the "clone" option? In what is it different from no selection of it?That means that the VM will be imported as a cloned VM - have different mac addresses, different identifiers for the disks, different identifier for the VM.