Here is another one you may want to consider pcAmerica - handheld inventory tracking

This is there description:

Symbol Technologies, the industry leader in barcode equipment has recently teamed up with 3Com Corporation to produce the most versatile solution for retail stores. The Symbol SPT-1550 Palm unit combines barcode scanner capability with the hot selling Palm Pilot.
With the built-in barcode scanner, the Palm Pilot makes wireless inventory tracking easier than ever. You can send all information to your computer at the touch of a button.

Pocket Inventory does just exactly that! With the Symbol SPT-1550 and Pocket Inventory you will never have to worry about long lists of inventory on your clipboard again. Simply scan an item "on the floor" and Pocket Inventory will keep a count. When you are done, Pocket Inventory will transmit your entire count to your computer.

You may also make quick changes to cost, price, description to an existing inventory list. as well. With a portable bar code printer, like the Code Ranger Plus from Coginitive Solutions, you can even print Bar Codes from your Palm Pilot!