I would like the ability to duplicate an inventory item. This would be helpful when creating a series of nearly identical SKUs, with minor variations. I'm typically adding 1-3 SKUs at a time, and it's just faster to do this through the web interface than through a spreadsheet.
On the item screen, it would be helpful to have arrow buttons that allow me to move backward and forward through a captured set. For instance, if I search for items with a specific prefix on their SKU, I could then go to the item page, make whatever change is needed, and then move to the next item in this set. Right now, I have to go to the item page, make my change, then hit the back button on my browser three times to get back to my search results.