Price It By Phone, and the Twilio API
I won the Twilio+AppEngine contest with Price It By Phone, an app that lets you look up Amazon.com book prices by touch-tone phone. Right now it's up and running at http://price-it.appspot.com.
If you try it and run into problems, please let me know!
My interview with Twilio is here. I like the Twilio API a lot. It's the easiest-to-use API imaginable. You set up your Twilio phone number with a URL to post to. Then, when you call the phone number, Twilio sends a POST request to that URL with the caller phone # and the digits entered as parameters. They have a Twilio-AppEngine sample among their demo apps. This is awesome. As you can see, I'm back to really liking GAE again, a lot.I'm putting a bit more time into Price-It and hoping to launch v2 soon. Features that I want to put into it for sure: support for ISBNs with Xs and any other chars that appear in them, user accounts, verifying your phone # before you're allowed to see your book lookup history, being able to delete your history. Possible features to be added: integration with Amazon wish list, FB connect. Also, I want to make it look web2.0 shiny, with cute illustrations and bright, designed gradients. Yes, I know that the dark, trippy background doesn't have mass appeal. Sometimes I make art for the sake of making myself happy :) View the page's source code to see how it's done. If you have other feature ideas, I'd be interested in hearing them.
Posted by Audrey M Roy

