It would be nice if we could see the full path of the images during bulk operations, or at least the year and month. If there are hundreds of files, that would give some indication of how far along the process is.
Other than that, it's a great plug-in. I got it to work flawlessly on Rackspace CloudSites, a system known for timing out easily. It went without a hitch and the bulk process has been converting images for more than one hour now. Good job!