Had a similar project based on OData called qwikstant.com, by no means a hit, but still trafficked. It's depressing to have to shutter it.. As I was developing I did notice that the OData DB was always slightly behind and the api forums were a ghost town - guess I should have seen it coming, but I had an itch. Got burned when google shut off services before as well, pretty sure I'm finished with free corporate APIs at this point, experimentation and one-offs aside.