Interesting idea, I guess we could generate our raw JSON feed from it.
More ideally though, I'd like to understand what sort of slicing and dicing you want to do. If it would help everyone in solving problems perhaps it would be best if we simply added those tools to Raygun to help everyone out!
We are at present adding support for aggregate data (e.g, you have an error group, what browsers does it impact? So you might see that a JS error is only occurring on IE, so you know how to more easily fix that rather than paging through instances to understand that it's only impacting IE).
Appreciate your feedback,