This has probably been mentioned many times before, but I didn't see it:
How about the ability to delete many items at once? If I have items that sell on other sites I would like to be able to remove many at once. The only way I know of now is to open each item and close or delete the item. This is several steps and a considerable time delay.
I would like to be able to do a search - say all by one author in my store - and be able to mark multiples for closing or deletion. This capability is in Amazon.com and in half.com.