I'm looking for a
- Fast changing
- Easy-to-deserialize (xml or json)
- Well formatted
data feed (I was thinking about a REST API, but I welcome any suggestion) for demonstrating a Java software component.
I don't really care what the data is about (weather, finance, anything goes), the main criteria is, that it should change pretty fast (new stuff at least every 5-10 seconds), and the format of the data should be well defined, so a JAXB / Gson parser can handle it.
If you have ever used such an open API, then please let me know!