Browser JSON Plugins

Im looking for a Safari/Webkit plugin similar to Firefox's JSONView, or the Pretty JSON Chrome extension. Anyone know of anything like this?

• JSONView - http://benhollis.net/blog/2009/02/24/jsonview-view-json-documents-in-firefox/
• Pretty JSON - https://chrome.google.com/extensions/detail/ddngkjbldiejbheifcmnfmmfiniimbbg

And even easier, with Safari 5: https://github.com/rfletcher/safari-json-formatter