Jan / Nicky:
This one's EASY !!! It would really help if the Admin Control Panel would display the number for each category in the "Edit Categories" table. This really comes in handy if you add a multiple new categories with the intent of using the "Check New Images" to batch upload many images. It would tell the administrator which directory to batch upload into via FTP.
As it is now, I have to use phpMyAdmin to peek into the category table to figure it out. What a pain...
How about it?