As this API is just entering public beta, it is highly advisable that you let me know if you build an application so I can contact you should any of the API details change - it's also great to see what people are building! Alternatively, you can subscribe to the blog on my website or follow me on Twitter for all of the latest updates.
If you'd like to get in touch with me, then please email me via firstname.lastname@example.org or you can use the contact form on bendodson.com. If you are reporting a bug or error, please give as much information as possible including the request you made, any response you received, and any other relevant information (e.g. if performed via PHP did you use cURL or file_get_contents(), etc.)
Alternatively, you can follow me on Twitter and send me a message there!