This is a very bizarre animal.
It's a river.js file that has an item that contains the OPML source encoded as JSON.
This means that a jQuery app that loaded this file would find the OPML structure already there in the DOM.
We're a short step from having Media Hackers be able to do something much richer with content.
I'm not sure where I should expect to find that structure embedded, but I do not see it on mediahackers, nor do I see it in the page content of this post.
My process is to right-click on any element and select "Inspect element". When I'm searching for stuff I usually start with an element near the top of the page. Once in the "Elements" inspector, on Windows Ctrl+F pops up a find field in the bottom of the developer tools. I typed '"opml":' and didn;t find anything, but typicl 'opml' found quite a few entries.
I'm still a newbie to most of the debugging tools in Chrome. I can fumble around enough to find problems and am getting better. I thought I'd go looking through http://mediahackers.org to see if I could find the DOM data its displaying. I want to see if the OPML actually makes it all the way through. Any tips would be much appreciated.