Chloe - JSON is typically converted to XML if it is used as a data transfer format...there are many tools that can do this...Omniscope can handle the XML...
If this is important enough, we may be able to add the JSON/XML conversion as a Connector or extension to our XML mapping...
I would like to see a JSON connector as well, I'm not fluent in any scripting language but it should be possible to use the script connector to parse JSON, also I know in R you can parse JSON so that could be bought into Omniscope that way too.