Just stumbled across Amabuddy, a VXML interface to Amazon.com, so you can use any phone to look up info by entering an ISBN or UPC number, and have Amazon info spoken in your ear (prices high and low , rating, related items, etc.) It's a pretty neat and simple interface. They even maintain an online history of your phone lookups, so by using your phone number as a key, you can recall your phone lookups from home later. Very nice.

The best part is how they bill the service: "This is for you to play with and enjoy hassle free". Their lookup is fast, the info is solid. Pretty fun. I'll keep the phone number on hand for the rare time I want more info about a book or CD but can't find a PC. Of course, they have a blog up for comments as well.