This is a hopefully small feature request :)

I would like to be able to do 

    thunar --some-switch folder-with-thousands-of-files/specific-file

and have Thunar open the folder "folder-with-thousands-of-files" and scroll "specific-file" into view, selecting it. 

This could be very useful in conjunction with "open containing folder" options of download managers and image viewers (e.g. opening a download among all the files in /tmp, or after clicking "next image" through a hundred files named DSC_numbernumber.JPG and finally finding the one you want).