The old (only a week old!) zip file upload process has been updated to include an upload progress bar.
The zip file upload process is now split over two pages, enter your gallery details on the first page, click continue, and then upload your zip file on the 2nd page. The 2 pages per upload is a bit of a pain, I know, but it is the best way to implement an upload progress bar.
Hope this helps, if you have any troubles with the new process then please let me know!